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Cryptography: Crash Course Computer Science #33
 
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Today we’re going to talk about how to keep information secret, and this isn’t a new goal. From as early as Julius Caesar’s Caesar cipher to Mary, Queen of Scots, encrypted messages to kill Queen Elizabeth in 1587, theres has long been a need to encrypt and decrypt private correspondence. This proved especially critical during World War II as Allan Turing and his team at Bletchley Park attempted to decrypt messages from Nazi Enigma machines, and this need has only grown as more and more information sensitive tasks are completed on our computers. So today, we’re going to walk you through some common encryption techniques such as the Advanced Encryption Standard (AES), Diffie-Hellman Key Exchange, and RSA which are employed to keep your information safe, private, and secure. Note: In October of 2017, researchers released a viable hack against WPA2, known as KRACK Attack, which uses AES to ensure secure communication between computers and network routers. The problem isn't with AES, which is provably secure, but with the communication protocol between router and computer. In order to set up secure communication, the computer and router have to agree through what's called a "handshake". If this handshake is interrupted in just the right way, an attacker can cause the handshake to fault to an insecure state and reveal critical information which makes the connection insecure. As is often the case with these situations, the problem is with an implementation, not the secure algorithm itself. Our friends over at Computerphile have a great video on the topic: https://www.youtube.com/watch?v=mYtvjijATa4 Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know more about Carrie Anne? https://about.me/carrieannephilbin The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV Want to find Crash Course elsewhere on the internet? Facebook - https://www.facebook.com/YouTubeCrash... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 198006 CrashCourse
Fiat Cryptography: Automatic Correct-by-Construction Generation of Low-Level Cryptographic Code
 
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Some of the most widely used cryptographic protocols, including TLS, depend on fast execution of modular big-number arithmetic. Cryptographic primitives are coded by an elite set of implementation experts, and most programmers are shocked to learn that performance-competitive implementations are rewritten from scratch for each new prime-number modulus and each significantly different hardware architecture. In the Fiat Cryptography project, we show for the first time that an automatic compiler can produce this modulus-specialized code, via formalized versions of the number-theoretic optimizations that had previously only been applied by hand. Through experiments for a wide range of moduli, compiled for 64-bit x86 and 32-bit ARM processors, we demonstrate typical speedups vs. an off-the-shelf big-integer library in the neighborhood of 5X, sometimes going up to 10X. As a bonus, our compiler is implemented in the Coq proof assistant and generates proofs of functional correctness. These combined benefits of rigorous correctness/security guarantees and labor-saving were enough to convince the Google Chrome team to adopt our compiler for parts of their TLS implementation in the BoringSSL library. The project is joint work with Andres Erbsen, Jade Philipoom, Jason Gross, and Robert Sloan.  See more at https://www.microsoft.com/en-us/research/video/fiat-cryptography-automatic-correct-by-construction-generation-of-low-level-cryptographic-code/
Views: 1146 Microsoft Research
What is a HashTable Data Structure - Introduction to Hash Tables , Part 0
 
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This tutorial is an introduction to hash tables. A hash table is a data structure that is used to implement an associative array. This video explains some of the basic concepts regarding hash tables, and also discusses one method (chaining) that can be used to avoid collisions. Wan't to learn C++? I highly recommend this book http://amzn.to/1PftaSt Donate http://bit.ly/17vCDFx
Views: 764065 Paul Programming
21. Cryptography: Hash Functions
 
01:22:01
MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas covers the basics of cryptography, including desirable properties of cryptographic functions, and their applications to security. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 69384 MIT OpenCourseWare
Digital Signatures
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 52187 Udacity
Dash: QT Wallet Receiving Address = G15E18
 
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Dash: QT Wallet Receiving Address What is : https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325335 How to: https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325343 Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 3014 Dash
Bitcoin 101 - Elliptic Curve Cryptography - Part 4 - Generating the Public Key (in Python)
 
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Welcome to part four in our series on Elliptic Curve Cryptography. I this episode we dive into the development of the public key. In just 44 lines of code, with no special functions or imports, we produce the elliptic curve public key for use in Bitcoin. Better still, we walk you through it line by line, constant by constant. Nothing makes the process clearer and easier to understand than seeing it in straight forward code. If you've been wondering about the secp256k1 (arguably the most important piece of code in Bitcoin), well then this is the video for you. This is part 4 of our upcoming series on Elliptic Curves. Because of such strong requests, even though this is part 4, it is the first one we are releasing. In the next few weeks we will release the rest of the series. Enjoy. Here's the link to our Python code (Python 2.7.6): https://github.com/wobine/blackboard101/blob/master/EllipticCurvesPart4-PrivateKeyToPublicKey.py Here's the private key and the link to the public address that we use. Do you know why it is famous? Private Key : A0DC65FFCA799873CBEA0AC274015B9526505DAAAED385155425F7337704883E Public Address on Blockchain.info https://blockchain.info/address/1JryTePceSiWVpoNBU8SbwiT7J4ghzijzW Here's the private key we use at the end: 42F615A574E9CEB29E1D5BD0FDE55553775A6AF0663D569D0A2E45902E4339DB Public Address on Blockchain.info https://blockchain.info/address/16iTdS1yJhQ6NNQRJqsW9BF5UfgWwUsbF Welcome to WBN's Bitcoin 101 Blackboard Series -- a full beginner to expert course in bitcoin. Please like, subscribe, comment or even drop a little jangly in our bitcoin tip jar 1javsf8GNsudLaDue3dXkKzjtGM8NagQe. Thanks, WBN
Views: 21299 CRI
Dash: QT Wallet Private Key Export/Import = G15E17
 
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Dash: QT Wallet Private Key Export/Import What is : https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325335 How to: https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325343 Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 5095 Dash
Blockchain Basics Explained - Hashes with Mining and Merkle trees
 
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A brief and simple introduction to the hash function and how blockchain solutions use it for proof of work (mining) and data integrity (Merkle Trees).
Views: 211420 Chainthat
Asymmetric encryption - Simply explained
 
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How does public-key cryptography work? What is a private key and a public key? Why is asymmetric encryption different from symmetric encryption? I'll explain all of these in plain English! 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
The Caesar cipher | Journey into cryptography | Computer Science | Khan Academy
 
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Brit explains the Caesar cipher, the first popular substitution cipher, and shows how it was broken with "frequency analysis" Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/polyalphabetic-cipher?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/intro-to-cryptography?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Computer Science on Khan Academy: Learn select topics from computer science - algorithms (how we solve common problems in computer science and measure the efficiency of our solutions), cryptography (how we protect secret information), and information theory (how we encode and compress information). About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Computer Science channel: https://www.youtube.com/channel/UC8uHgAVBOy5h1fDsjQghWCw?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 593157 Khan Academy
What is NEIGHBOR DISCOVERY PROTOCOL? What does NEIGHBOR DISCOVERY PROTOCOL mean?
 
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What is NEIGHBOR DISCOVERY PROTOCOL? What does NEIGHBOR DISCOVERY PROTOCOL mean? NEIGHBOR DISCOVERY PROTOCOL meaning - NEIGHBOR DISCOVERY PROTOCOL definition - NEIGHBOR DISCOVERY PROTOCOL explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ The Neighbor Discovery Protocol (NDP, ND) is a protocol in the Internet protocol suite used with Internet Protocol Version 6 (IPv6). It operates at the Network Layer of the Internet model (RFC 1122), and is responsible for address autoconfiguration of nodes, discovery of other nodes on the link, determining the addresses of other nodes, duplicate address detection, finding available routers and Domain Name System (DNS) servers, address prefix discovery, and maintaining reachability information of other active neighbor nodes. The protocol defines five different ICMPv6 packet types to perform functions for IPv6 similar to the Address Resolution Protocol (ARP) and Internet Control Message Protocol (ICMP) Router Discovery and Router Redirect protocols for IPv4. However, it provides many improvements over its IPv4 counterparts (RFC 4861, section 3.1). For example, it includes Neighbor Unreachability Detection (NUD), thus improving robustness of packet delivery in the presence of failing routers or links, or mobile nodes. The Inverse Neighbor Discovery (IND) protocol extension (RFC 3122) allows nodes to determine and advertise an IPv6 address corresponding to a given link-layer address, similar to Reverse ARP for IPv4. The Secure Neighbor Discovery Protocol (SEND), a security extension of NDP, uses Cryptographically Generated Addresses (CGA) and the Resource Public Key Infrastructure (RPKI) to provide an alternate mechanism for securing NDP with a cryptographic method that is independent of IPsec. Neighbor Discovery Proxy (ND Proxy) (RFC 4389) provides a service similar to IPv4 Proxy ARP and allows bridging multiple network segments within a single subnet prefix when bridging cannot be done at the link layer.
Views: 638 The Audiopedia
What is CAPABILITY-BASED ADDRESSING? What does CAPABILITY-BASED ADDRESSING mean?
 
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What is CAPABILITY-BASED ADDRESSING? What does CAPABILITY-BASED ADDRESSING mean? CAPABILITY-BASED ADDRESSING meaning - CAPABILITY-BASED ADDRESSING definition - CAPABILITY-BASED ADDRESSING explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ In computer science, capability-based addressing is a scheme used by some computers to control access to memory. Under a capability-based addressing scheme, pointers are replaced by protected objects (called capabilities) that can be created only through the use of privileged instructions which may be executed only by either the kernel or some other privileged process authorised to do so. This effectively allows the kernel to control which processes may access which objects in memory without the need to use separate address spaces and therefore requiring a context switch when an access occurs. This allows an efficient implementation of capability-based security. Two techniques are available for implementation: 1. Require capabilities to be stored in a particular area of memory that cannot be written to by the process that will use them. For example, the Plessey System 250 required that all capabilities be stored in capability-list segments. 2. Extend memory with an additional bit, writable only in supervisor mode, that indicates that a particular location is a capability. This is a generalization of the use of tag bits to protect segment descriptors in the Burroughs large systems, and it was used to protect capabilities in the IBM System/38. The designers of the System/38's descendent systems, including AS/400 and IBM i, removed capability-based addressing. The reason given for this decision is that they could find no way to revoke capabilities (although patterns for implementing revocation in capability systems had been published as early as 1974, even before the introduction of System/38).
Views: 45 The Audiopedia
Understanding the Key Verification Algorithm (Keygen part 3) - Pwn Adventure 3
 
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Part 17: This video might be a bit more boring reversing, and I even failed to recognise the implemented algorithm. 🌴 Playlist: https://www.youtube.com/playlist?list=PLhixgUqwRTjzzBeFSHXrw9DnQtssdAwgG -=[ 🔴 Stuff I use ]=- → Microphone:* https://amzn.to/2LW6ldx → Graphics tablet:* https://amzn.to/2C8djYj → Camera#1 for streaming:* https://amzn.to/2SJ66VM → Lens for streaming:* https://amzn.to/2CdG31I → Connect Camera#1 to PC:* https://amzn.to/2VDRhWj → Camera#2 for electronics:* https://amzn.to/2LWxehv → Lens for macro shots:* https://amzn.to/2C5tXrw → Keyboard:* https://amzn.to/2LZgCFD → Headphones:* https://amzn.to/2M2KhxW -=[ ❤️ Support ]=- → per Video: https://www.patreon.com/join/liveoverflow → per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ 🐕 Social ]=- → Twitter: https://twitter.com/LiveOverflow/ → Website: https://liveoverflow.com/ → Subreddit: https://www.reddit.com/r/LiveOverflow/ → Facebook: https://www.facebook.com/LiveOverflow/ -=[ 📄 P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm. #CTF #PwnAdventure #ReverseEngineering
Views: 28871 LiveOverflow
Dash: The Bitcoin Address: A. M Antonopoulos 'What Bitcoin Means For Unbanked Economies = M14E02'
 
01:35:52
The Bitcoin Address: Andreas M Antonopoulos 'What Bitcoin Means For Unbanked Economies' Nov 2014 A.A. mentions DRK 48 min 18 sec Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 21463 Dash
What is FIREWALL PINHOLE? What does FIREWALL PINHOLE mean? FIREWALL PINHOLE meaning & explanation
 
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What is FIREWALL PINHOLE? What does FIREWALL PINHOLE mean? FIREWALL PINHOLE meaning - FIREWALL PINHOLE definition - FIREWALL PINHOLE explanation. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. In computer networking, a firewall pinhole is a port that is not protected by a firewall to allow a particular application to gain access to a service on a host in the network protected by the firewall. Leaving ports open in firewall configurations exposes the protected system to potentially malicious abuse. A fully closed firewall prevents applications from accessing services on the other side of the firewall. For protection, the mechanism for opening a pinhole in the firewall should implement user validation and authorization. For firewalls performing a network address translation (NAT) function, the mapping between the external {IP address, port} socket and the internal {IP address, port} socket is often called a pinhole. Pinholes can be created manually or programmatically. They can be temporary, created dynamically for a specific duration such as for a dynamic connection, or permanent, such as for signaling functions. Firewalls sometimes automatically close pinholes after a period of time (typically a few minutes) to minimize the security exposure. Applications that require a pinhole to be kept open often need to generate artificial traffic through the pinhole in order to cause the firewall to restart its timer.
Views: 64 The Audiopedia
Dash: What is Dash? = P16E03
 
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Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 1225 Dash
Hashing and Hash table in data structure and algorithm
 
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This video lecture is produced by S. Saurabh. He is B.Tech from IIT and MS from USA. hashing in data structure hash table hash function hashing in dbms To study interview questions on Linked List watch http://www.youtube.com/playlist?list=PL3D11462114F778D7&feature=view_all To prepare for programming Interview Questions on Binary Trees http://www.youtube.com/playlist?list=PLC3855D81E15BC990&feature=view_all To study programming Interview questions on Stack, Queues, Arrays visit http://www.youtube.com/playlist?list=PL65BCEDD6788C3F27&feature=view_all To watch all Programming Interview Questions visit http://www.youtube.com/playlist?list=PLD629C50E1A85BF84&feature=view_all To learn about Pointers in C visit http://www.youtube.com/playlist?list=PLC68607ACFA43C084&feature=view_all To learn C programming from IITian S.Saurabh visit http://www.youtube.com/playlist?list=PL3C47C530C457BACD&feature=view_all
Views: 318181 saurabhschool
What is CRYPTOVIROLOGY? What does CRYPTOVIROLOGY mean? CRYPTOVIROLOGY meaning & explanation
 
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What is CRYPTOVIROLOGY? What does CRYPTOVIROLOGY mean? CRYPTOVIROLOGY meaning - CRYPTOVIROLOGY pronunciation - CRYPTOVIROLOGY definition - CRYPTOVIROLOGY explanation - How to pronounce CRYPTOVIROLOGY? Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Cryptovirology is a field that studies how to use cryptography to design powerful malicious software. The field was born with the observation that public-key cryptography can be used to break the symmetry between what an antivirus analyst sees regarding malware and what the attacker sees. The antivirus analyst sees a public key contained in the malware whereas the attacker sees the public key contained in the malware as well as the corresponding private key (outside the malware) since the attacker created the key pair for the attack. The public key allows the malware to perform trapdoor one-way operations on the victim's computer that only the attacker can undo. The first attack that was identified by Adam L. Young and Moti Yung in the field is called "cryptoviral extortion" and it was presented at the 1996 IEEE Security & Privacy conference. In this attack a cryptovirus, cryptoworm, or cryptotrojan contains the public key of the attacker and hybrid encrypts the victim's files. The malware prompts the user to send the asymmetric ciphertext to the attacker who will decipher it and return the symmetric decryption key it contains for a fee. The victim needs the symmetric key to get the files back if there are no backups of them. The 1996 IEEE paper of Young and Yung predicted that cryptoviral extortion attackers would one day demand e-money, long before bitcoin even existed. Many years later the media relabeled cryptoviral extortion as ransomware. In 2016 cryptovirology attacks on healthcare providers reached epidemic levels prompting the U.S. Department of Health and Human Services to issue a Fact Sheet on Ransomware and HIPAA. The fact sheet states that when electronic protected health information is encrypted by ransomware a breach has occurred and the attack therefore constitutes a disclosure that is not permitted under HIPAA. The rationale being that an adversary has taken control of the information. This expansion of the term "breach" to account for cryptoviral extortion is monumental since now a "breach" can happen even when sensitive data never leaves the victim organization. California enacted a law that defines the introduction of ransomware into a computer system with the intent of extortion as being against the law. This is SB-1137 that amends Section 523 of the Penal Code. The field also encompasses covert malware attacks in which the attacker securely steals private information such as symmetric keys, private keys, PRNG state, and the victim's data. Examples of such covert attacks are asymmetric backdoors. An asymmetric backdoor is a backdoor (e.g., in a cryptosystem) that can be used only by the attacker, even after it is found. This contrasts with the traditional backdoor that is symmetric, i.e., anyone that finds it can use it. Kleptography, a subfield of cryptovirology, is the study of asymmetric back doors in key generation algorithms, digital signature algorithms, key exchanges, pseudorandom number generators, encryption algorithms, and other cryptographic algorithms. The NIST Dual EC DRBG random bit generator has an asymmetric backdoor in it. The EC-DRBG algorithm utilizes the discrete-log kleptogram from Kleptography which by definition makes the EC-DRBG a cryptotrojan. Like ransomware, the EC-DRBG cryptotrojan contains and uses the attacker's public key to attack the host system. A highly respected cryptographer, Ari Juels, indicated that NSA effectively orchestrated a kleptographic attack on users of the Dual EC DRBG pseudorandom number generation algorithm and that, although security professionals and developers have been testing and implementing kleptographic attacks since 1996, "you would be hard-pressed to find one in actual use until now". Due to public outcry of this cryptovirology attack, NIST rescinded the EC-DRBG algorithm from the NIST SP 800-90 standard.
Views: 350 The Audiopedia
Dash: QT Wallet How to buy/ Exmo = G16E13
 
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Dash: QT Wallet How to buy/ Exmo Exmo Online Exchange: https://exmo.com Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 250 Dash
22. Cryptography: Encryption
 
01:24:15
MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas continues with cryptography, introducing encryption methods. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 16400 MIT OpenCourseWare
IDENTITY ON BLOCKCHAIN
 
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An address is just like an account number in bank. It denotes your unique identity on the blockchain from which you can transfer out cryptocurrency and to which you can receive cryptocurrency. In blockchain a standard address has something like 34 signs and starts with a 1. It may look something like 1K31KXZjcochXpRhjH9g5MxFFTHPi2zEXb. Subscribe to our channel to learn more about Cryptocurrencies and Blockchain Technology. To get certified as a Blockchain Generalist and Ethereum Developer visit Blockchain Semantics. Blockchain Semantics is Asia’s largest Blockchain tutorial. We have been working on Blockchain and realized that there is a great dearth of Blockchain knowledge. Thus we have created video tutorials for people who want to learn Blockchain. Anyone can learn Blockchain from our video and can develop a DApp using Solidity on Ethereum. Introduction to Blockchain and Bitcoin This Course helps students get a thorough understanding of the basics of Blockchain, giving them a solid foundation that they can build careers upon, then move to advanced knowledge, teaching them how they can implement Blockchain technology in real-life use-cases. This course is ideal for: • Employees who would like to use Blockchain technology in their work • Students who wish to implement Blockchain in their projects • Investors who want a greater understanding of the industry • Entrepreneurs who see an opportunity for business in this technology • Product managers • Industry leader Consultants Ethereum Developer Course for developing decentralized applications on Ethereum using solidity. Solidity is a high-level programming language designed for writing smart contracts on the Ethereum Blockchain. It has a syntax similar to that of JavaScript making it easier to understand and implement for beginner level programmers. Coding is done on the basis of rules of the Ethereum Virtual Machine, the compiler for the "Ethereum World Computer". The series of lectures in this course will take you through the basics of the Ethereum Blockchain and its EVM architecture and as this course ends, you will feel empowered writing DApps on Ethereum using Solidity. You will be able to make your very own smart contracts and deploy it successfully over the Ethereum Blockchain Network. This course is regularly updated keeping in mind the developments happening on core Ethereum network itself. It takes a step-by-step approach to teaching students how to build their decentralized apps. It also includes one-on-one live doubt clearing sessions for aspirants to clear all of their doubts. The Ethereum Developer course is suitable for people who know the basics of Javascript, Angular JS, web development, Ajax Request, Gulp/Grunt and the Node, Package Manager. These concepts are built on throughout the classes. By the end of the course, students will: • Learn fundamental Ethereum Blockchain concepts, terminologies, and basic functionality to build and deploy smart contracts on the Ethereum network. • Identify ways in which smart contracts made on Ethereum Blockchain can be used to provide a more sophisticated alternative to traditional contracts by developing a more robust, secure and faster system. • Write smart contracts using Solidity. • Build end-to-end distributed applications on Ethereum. • Use Decentralized applications to replicate popular use cases like: Land Registry system Trade Finance applications Supply chain system Initial Coin offerings for tokens developed using ERC-20 token standards Investing in Bitcoin and cryptocurrencies: Cryptocurrencies have gained the attention of investors. There has been a lot of investment in cryptocurrency. And people are making money out of it. For example, if you would have invested in Bitcoin in January 2017, now it would have been 12 times your investment. There are several other cryptocurrencies which have grown 100 times and THAT’s HUGE! One of the examples is Dash. Cryptocurrency market is highly volatile, its prices rise and drops very quickly. There have been many questions about which cryptocurrencies to buy, when to buy and sell, how to invest in ICOs and is mining profitable? This course answers all the questions that one needs to know before investing in cryptocurrencies. This course is designed for the beginners who have no investing knowledge in the crypto world. In this course, you will understand: What is Blockchain and how it works What is cryptocurrency, altcoins What are the top cryptocurrencies What is the risk involved in the crypto world How to analyze the market and make a profit How to invest in ICOs and mining How to research and find good cryptocurrencies to invest Website: https://www.blockchainsemantics.com/ Facebook: https://business.facebook.com/Blockchain-Semantics-989004304572982 Twitter: https://twitter.com/blockchain_sem Linkedin: https://www.linkedin.com/company/blockchain-semantics
USER AUTHENTICATION USING CRYPTOGRAPHY AND STEGANOGRAPHY FOR WEB APPLICATIONS
 
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This project is based on E-voting. It authenticates the voters through Cryptography and Steganography algorithms. After the voter successfully logins to the voting portal, further, public key algorithms are used to encrypt user sessions.
Views: 77 gagan suneja
PCI Requirement 3.6.1 Generation of Strong Cryptographic Keys
 
01:50
PCI Requirement 3.6.1 requires, “Generation of strong cryptographic keys.” It also requires that, “The encryption solution must generate strong keys, as defined in the PCI DSS and PA-DSS Glossary of Terms, Abbreviations, and Acronyms under ""Cryptographic Key Generation."" The intent of PCI Requirement 3.6.1, according to the PCI DSS, is to “significantly increases the level of security of encrypted cardholder data.” PCI Requirement 3.6.1 is part of the 8 sub-requirements of PCI Requirement 3.6, which is meant to build your organization’s key management program because, the PCI DSS states, “The manner in which cryptographic keys are managed is a critical part of the continued security of the encryption solution. A good key management process, whether it is manual or automated as part of the encryption product, is based on industry standards and addresses all key elements at 3.6.1 through 3.6.8.” We recommend that you perform a risk assessment around the generation of your cryptographic keys; this way, you can see if your keys become weakened or hold up. Industry standards, like NIST, should be used when determining how to manage and generate keys. If you store, process, or transmit cardholder data, interact with payment card data in any way, or have the ability to impact someone else’s cardholder information or the security of that information, you are subject to comply with the PCI DSS. This exclusive video series, PCI Demystified, was developed to assist your organization in understanding what the Payment Card Industry Data Security Standard (PCI DSS) is, who it applies to, what the specific requirements are, and what your organizations needs to know and do to become compliant. Learn more at https://kirkpatrickprice.com/video/pci-requirement-3-6-1-generation-strong-cryptographic-keys/ Video Transcription If you’re using encryption within your environment, you need to use strong encryption. What this effectively means is that you need to generate strong keys. Once again, you need to be using an industry best practice for this. One of the things that I would recommend that you do as part of your risk management program, just like the annual risk assessment that you’re required to do, is that you perform somewhat of a risk assessment around the generation of your keys. If during the period of time, your encryption keys become deprecated or weakened because of some change to the industry, you must have a process for generating a new key. We’ll be talking about that in a subsequent video. Specific to PCI Requirement 3.6.1, you have to have a process in place where you’re actually generating strong keys. IF you have an HSM, that’s kind of inherent in using the HSM itself. If you have a clear text process where you’re managing or developing these keys, it needs to be done securely. I would recommend that you look at industry best practices like NIST 800-57 for that information. Stay Connected Twitter: https://twitter.com/KPAudit LinkedIn: https://www.linkedin.com/company/kirkpatrickprice-llc Facebook: https://www.facebook.com/kirkpatrickprice/ More Free Resources PCI Demystified: https://kirkpatrickprice.com/pci-demystified/ Blog: https://kirkpatrickprice.com/blog/ Webinars: https://kirkpatrickprice.com/webinars/ Videos: https://kirkpatrickprice.com/video/ White Papers: https://kirkpatrickprice.com/white-papers/ About Us KirkpatrickPrice is a licensed CPA firm, PCI QSA, and a HITRUST CSF Assessor, registered with the PCAOB, providing assurance services to over 600 clients in more than 48 states, Canada, Asia, and Europe. The firm has over 12 years of experience in information security and compliance assurance by performing assessments, audits, and tests that strengthen information security and internal controls. KirkpatrickPrice most commonly provides advice on SOC 1, SOC 2, HIPAA, HITRUST CSF, PCI DSS, ISO 27001, FISMA, and CFPB frameworks. For more about KirkpatrickPrice: https://kirkpatrickprice.com/ Contact us today: 800-770-2701 https://kirkpatrickprice.com/contact/
Views: 141 KirkpatrickPrice
Dash: QT Wallet How to buy/ Shapeshift = G16E15
 
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Dash: QT Wallet How to buy/ Shapeshift Shapeshift Online Exchange: https://shapeshift.io Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 294 Dash
What is ZOOKO'S TRIANGLE? What does ZOOKO'S TRIANGLE mean? ZOOKO'S TRIANGLE meaning & explanation
 
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What is ZOOKO'S TRIANGLE? What does ZOOKO'S TRIANGLE mean? ZOOKO'S TRIANGLE meaning - ZOOKO'S TRIANGLE definition - ZOOKO'S TRIANGLE explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Zooko's triangle is a trilemma of three properties that are generally considered desirable for names of participants in a network protocol: Human-meaningful: Meaningful and memorable (low-entropy) names are provided to the users. Secure: The amount of damage a malicious entity can inflict on the system should be as low as possible. Decentralized: Names correctly resolve to their respective entities without the use of a central authority or service. Zooko Wilcox-O'Hearn conjectured that no single kind of name can achieve more than two. For example: DNSSec offers a secure, human-meaningful naming scheme, but is not secure against compromise by the root; .onion addresses and bitcoin addresses are secure and decentralized but not human-meaningful; and I2P uses name translation services which are secure (as they run locally) and provide human-meaningful names - but fail to provide unique entities when used globally in a decentralised network without authorities. Several systems which exhibit all three properties of Zooko's triangle have now been created, including: Computer scientist Nick Szabo's paper "Secure Property Titles with Owner Authority" illustrated that all three properties can be achieved up to the limits of Byzantine fault tolerance. Activist Aaron Swartz described a naming system based on Bitcoin employing Bitcoin's distributed blockchain as a proof-of-work to establish consensus of domain name ownership. These systems remain vulnerable to Sybil attack, but are secure under Byzantine assumptions. Namecoin now implements the concept. Several platforms implement refutations of Zooko's conjecture, including: Twister (which use the later Aaron Swartz system with a bitcoin-like system), Blockstack (which can run on any blockchain and currently uses Bitcoin), Namecoin (separate blockchain), and Monero OpenAlias.
Views: 34 The Audiopedia
Dash: QT Wallet Installation Guide - Linux = G15E01
 
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QT Wallet Installation Guide - Linux What is : https://dashpay.atlassian.net/wiki/pa... How to: https://dashpay.atlassian.net/wiki/pa... Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 908 Dash
DEF CON 25 - Jim Nitterauer - DNS: Devious Name Services Destroying Privacy & Anonymity w/o consent
 
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You've planned this engagement for weeks. Everything's mapped out. You have tested all your proxy and VPN connections. You are confident your anonymity will be protected. You fire off the first round and begin attacking your target. Suddenly something goes south. Your access to the target site is completely blocked no matter what proxy or VPN you use. Soon, your ISP contacts you reminding you of their TOS while referencing complaints from the target of your engagement. You quickly switch MAC addresses and retry only to find that you are quickly blocked again! What happened? How were you betrayed? The culprit? Your dastardly DNS resolvers and more specifically, the use of certain EDNS0 options by those resolvers. This presentation will cover the ways in which EDNS OPT code data can divulge details about your online activity, look at methods for discovering implementation by upstream DNS providers and discuss ways in which malicious actors can abuse these features. We will also examine steps you can take to protect yourself from these invasive disclosures. The details covered will be only moderately technical. Having a basic understanding of RFC 6891 and general DNS processes will help in understanding. We will discuss the use of basic tools including Wireshark, Packetbeat, Graylog and Dig.
Views: 4658 DEFCONConference
Zerocash: Addressing Bitcoin's Privacy Problem
 
01:18:45
A Google TechTalk, 8/28/17, presented by Alessandro Chiesa Abstract: In Bitcoin, a payment's details are broadcast in the clear, so that anyone can verify its validity. Unfortunately, this violates user privacy and sacrifices coin fungibility. I will describe the Zerocash protocol, which uses zero knowledge proofs to achieve privacy-preserving payments in a Bitcoin-like system. This protocol was recently deployed in the wild, as part of the cryptocurrency Zcash. About the Speaker: Alessandro Chiesa is an assistant professor in the Department of Electrical Engineering and Computer Science at UC Berkeley. His research spans the areas of complexity theory, cryptography, and security, and focuses on the theoretical foundations and practical implementations of cryptographic proof systems such as zero knowledge proofs. He is a co-inventor of Zerocash and co-founder of Zcash. He is an author of libsnark, the leading open-source library for succinct zero knowledge proofs. He has received a Ph.D. in computer science from MIT in 2014, and B.S. degrees in computer science and in mathematics from MIT in 2009.
Views: 3089 GoogleTechTalks
How Bitcoin Works in 5 Minutes (Technical)
 
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A short introduction to how Bitcoin Works. Want more? Check out my new in-depth course on the latest in Bitcoin, Blockchain, and a survey of the most exciting projects coming out (Ethereum, etc): https://app.pluralsight.com/library/courses/bitcoin-decentralized-technology Lots of demos on how to buy, send, store (hardware, paper wallet). how to use javascript to send bitcoin. How to create Ethereum Smart Contract, much more. Written Version: http://www.imponderablethings.com/2014/04/how-bitcoin-works-in-5-minutes.html Less technical version: https://www.youtube.com/watch?v=t5JGQXCTe3c Donation address: 1K7A6wsyxj6fThtMYcNu6X8bLbnNKovgtP Germain caption translation provided by adi331 : 19s6rqRfHa19w7wcgwtCumPs1vdLDj1VVo (thanks!!)
Views: 5643624 CuriousInventor
Dash: QT Wallet Installation Guide - PC =G15E03
 
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Dash - QT Wallet Installation Guide - Windows What is : https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325335 How to: https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325343 Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 1188 Dash
Dash: QT Wallet How to use Instant Transactions = G15E16
 
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Dash: QT Wallet How to use Instant Transactions Instant Transactions: https://dashpay.atlassian.net/wiki/display/DOC/InstantX Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 407 Dash
Bitcoin Q&A: What is a private key?
 
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What is a private key? How are they generated and formatted? Are private keys transmitted when you make a transaction? What are the chances of collision? Will quantum computing making it easy to guess private keys? Does implementing quantum-proof algorithms require an overhaul of the code? Learn more from the following chapters of 'Mastering Bitcoin': https://github.com/bitcoinbook/bitcoinbook/blob/f8b883dcd4e3d1b9adf40fed59b7e898fbd9241f/ch04.asciidoc https://github.com/bitcoinbook/bitcoinbook/blob/f8b883dcd4e3d1b9adf40fed59b7e898fbd9241f/ch05.asciidoc Key to address code: https://github.com/bitcoinbook/bitcoinbook/blob/35f1c62f192dd0eaf1b1c462f88a46e0f5942e16/code/key-to-address-ecc-example.py These questions are from the MOOC 9.3 and 9.4 sessions, as well as the (rescheduled) April Patreon Q&A session, which took place on March 2nd, March 9th, and May 5th 2018 respectively. Andreas is a teaching fellow with the University of Nicosia. The first course in their Master of Science in Digital Currency degree, DFIN-511: Introduction to Digital Currencies, is offered for free as an open enrollment MOOC course to anyone interested in learning about the fundamental principles. If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron: https://www.patreon.com/aantonop RELATED: Bitcoin: Where the Laws of Mathematics Prevail - https://youtu.be/HaJ1hvon0E0 Advanced Bitcoin Scripting Part 1: Transactions & Multisig - https://youtu.be/8FeAXjkmDcQ Advanced Bitcoin Scripting Part 2: SegWit, Consensus, and Trustware - https://youtu.be/pQbeBduVQ4I Cryptographic primitives - https://youtu.be/RIckQ6RBt5E Nonces, mining, and quantum computing - https://youtu.be/d4xXJh677J0 Public keys vs. addresses - https://youtu.be/8es3qQWkEiU Re-using addresses - https://youtu.be/4A3urPFkx8g What happens to our bitcoins during a hard fork? - https://youtu.be/sNR76fWd7-0 How do mnemonic seeds work? - https://youtu.be/wWCIQFNf_8g Multi-signature and distributed storage - https://youtu.be/cAP2u6w_1-k What is Segregated Witness? - https://youtu.be/dtOjjB4mD8k SegWit and fork research - https://youtu.be/OorLoi01KEE Forkology: A Study of Forks for Newbies - https://youtu.be/rpeceXY1QBM MimbleWimble and Schnorr signatures - https://youtu.be/qloq75ekxv0 Protocol development security - https://youtu.be/4fsL5XWsTJ4 Migrating to post-quantum cryptography - https://youtu.be/dkXKpMku5QY Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin. Follow on Twitter: @aantonop https://twitter.com/aantonop Website: https://antonopoulos.com/ He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters. THE INTERNET OF MONEY, v1: https://www.amazon.co.uk/Internet-Money-collection-Andreas-Antonopoulos/dp/1537000454/ref=asap_bc?ie=UTF8 [NEW] THE INTERNET OF MONEY, v2: https://www.amazon.com/Internet-Money-Andreas-M-Antonopoulos/dp/194791006X/ref=asap_bc?ie=UTF8 MASTERING BITCOIN: https://www.amazon.co.uk/Mastering-Bitcoin-Unlocking-Digital-Cryptocurrencies/dp/1449374042 [NEW] MASTERING BITCOIN, 2nd Edition: https://www.amazon.com/Mastering-Bitcoin-Programming-Open-Blockchain/dp/1491954388 Translations of MASTERING BITCOIN: https://bitcoinbook.info/translations-of-mastering-bitcoin/ Subscribe to the channel to learn more about Bitcoin & open blockchains! Music: "Unbounded" by Orfan (https://www.facebook.com/Orfan/) Outro Graphics: Phneep (http://www.phneep.com/) Outro Art: Rock Barcellos (http://www.rockincomics.com.br/)
Views: 8392 aantonop
An Encryption Scheme Using Chaotic Map and Genetic Operations for Wireless Sensor Networks
 
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An Encryption Scheme Using Chaotic Map and Genetic Operations for Wireless Sensor Networks To get this project in ONLINE or through TRAINING Sessions, Contact: JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai -83.Landmark: Next to Kotak Mahendra Bank. Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai,Thattanchavady, Puducherry -9.Landmark: Next to VVP Nagar Arch. Mobile: (0) 9952649690, Email: [email protected], web: www.jpinfotech.org, Blog: www.jpinfotech.blogspot.com Over the past decade, the application domain of wireless sensor networks has expanded steadily, ranging from environmental management to industry control, and from structural health monitoring to strategic surveillance. With the proliferation of sensor networks at home, work place, and beyond, securing data in the network has become a challenge. A number of security mechanisms have been proposed for sensor networks to provide data confidentiality: 1) advanced encryption system; 2) KATAN; 3) LED; and 4) TWINE. However, these schemes have drawbacks, including security vulnerabilities, need for hardware based implementation, and higher computational complexity. To address these limitations, we propose a lightweight block cipher based on chaotic map and genetic operations. The proposed cryptographic scheme employs elliptic curve points to verify the communicating nodes and as one of the chaotic map parameters to generate the pseudorandom bit sequence. This sequence is used in XOR, mutation, and crossover operations in order to encrypt the data blocks. The experimental results based on Mica2 sensor mote show that the proposed encryption scheme is nine times faster than the LED protocol and two times faster than the TWINE protocol. We have also performed a number of statistical tests and cryptanalytic attacks to evaluate the security strength of the algorithm and found the cipher provably secure.
Views: 940 jpinfotechprojects
DEFCON 20: No More Hooks: Detection of Code Integrity Attacks
 
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Speakers: XENO KOVAH THE MITRE CORPORATION COREY KALLENBERG THE MITRE CORPORATION Hooking is the act of redirecting program control flow somewhere other than it would go by default. For instance code can be "inlined hooked" by rewriting instructions to unconditionally transfer to other code. Or code can be hooked by manipulating control flow data like function pointers (IAT, IDT, SSDT, return addresses on the stack, callback addresses in dynamically allocated objects, etc). Hooking as a technique is neutral, but it is often used by malicious software to monitor or hide information on a system. Memory integrity verification requires the ability to detect unexpected hooks which could be causing software to lie or be blinded to the true state of the system. But we don't want to make the same mistake that most security software makes, assuming that they can rely on some built in access control to keep malice at arms length. The history of exploits is the history of bypassing access control. We want to have a technique which can detect if we ourselves are being manipulated to lie even when the attacker is assumed to be at the same high privilege level as our software. We believe that such a goal can be achieved with the help of an academic technique known as software-based, or timing-based, remote attestation. This is a technique which does not require a hardware root of trust like a TPM in order to bootstrap an ephemeral dynamic root of trust for measurement. It does this by computing a randomized checksum over its own memory and other system state, to detect code or control flow integrity attacks. The self-checking software can still be forced to lie and report an unmodified system, but thanks to a special looping construction, code which causes it to lie will require extra instructions per loop. The extra instructions will be multiplied by the number of loops, causing a macroscopic, remotely-detectable, increase in the runtime vs. what's expected. So basically, an attacker can force our software to lie, but because there's a timing side-channel built into the computation, he can still be caught by taking too long to generate a convincing lie. We have independently implemented and confirmed the claims of past work, and furthermore showed that the timing discrepancy in the presence of a checksum-forging attacker is detectable not just for machines on the same ethernet segment, but over 10 links of our production LAN. Because of the results of other work in timing side-channel detection over internet-scale distances, we think this technique can be extended even further. But for now for longer distances, we use this same timing-based technique in concert with TPM as a trustworthy timer, so that network jitter is not an issue. For more information visit: http://bit.ly/defcon20_information To download the video visit: http://bit.ly/defcon20_videos Playlist DEFCON 20: http://bit.ly/defcon20_playlist
Views: 2431 Christiaan008
Dash: QT Wallet Installation Guide - MAC =G15E02
 
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Dash - QT Wallet Installation Guide - Mac What is : https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325335 How to: https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325343 Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 633 Dash
Dash: QT Wallet How to buy/ Poloniex = G16E14
 
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Dash: QT Wallet How to buy/ Poloniex Poloniex Online Exchange: https://www.poloniex.com Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 814 Dash
Dash: Presentation Barcelona BTC Group - May 2015 = C15E01
 
49:38
Dash Talk Barcelona BTC Group - May 26 2015 by Fernando Tx Aleix Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 884 Dash
Dash: 1 Min Darkcoin vs Bitcoin by Evan Duffield / www.cryptomoneyexpo.com online Expo = C14E01
 
01:22
1 Min Darkcoin vs Bitcoin by Evan Duffield part of www.cryptomoneyexpo.com online Expo Nov 2014 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 1218 Dash
Discovering Satoshi: Nick Szabo
 
03:20
Thinking about purchasing a Ledger Nano Hardware Wallet? Browse their official website: https://www.ledgerwallet.com/r/67ef Want to join coinbase to begin your crypto journey? Here’s a link to get free $10: https://www.coinbase.com/join/558828dc34383271a500003b Step up your game and Check Out Binance too: https://www.binance.com/?ref=10080191 Join the Robinhood app and invite your friends to Robinhood and win free stock. Here's my invite: http://share.robinhood.com/heidic1 Find me on Steemit: www.steemit.com/@heiditravels Twitter: @blockchainchick Instagram: @hheidiann If you’re looking for an app that tracks the price of BTC & ETH and many other coins, check out the CoinView App: https://play.google.com/store/apps/details?id=br.com.freeflowt.coinview LINKS FOR ADDITIONAL READING FOR THIS VIDEO & ALL INFO IN TEXT DOWN BELOW: Wiki: https://en.wikipedia.org/wiki/Nick_Szabo Twitter: https://twitter.com/NickSzabo4 Nick Szabo Blog: https://unenumerated.blogspot.com/2018/ Interview with Tim Ferris: https://tim.blog/2017/06/04/nick-szabo/ Similar Thoughts, Satoshi and Szabo: https://medium.com/@rextar4444/if-satoshi-nakamoto-and-nick-szabo-have-the-same-unique-argument-does-that-make-it-stronger-8299c32eb4d7 Shelling Out: http://nakamotoinstitute.org/shelling-out/ Logical Emergence of Money from Barter: http://nakamotoinstitute.org/shelling-out/ Byzantine Fault-Tolerace: https://en.wikipedia.org/wiki/Byzantine_fault_tolerance Today’s subject is Nick Szabo. Nick is a polymath, meaning he is an expert in many different subject areas. In his case, he is a computer scientist, economist, and legal scholar and cryptographer. This guy has had quite the foresight with his ideas and things that have ended up coming to fruition in this crypto space. He designed “Bit Gold” about a decade before Bitcoin, which has been called the predecessor for the Bitcoin architecture. Bit gold would have worked so that participants would dedicate computer power to solve cryptographic puzzles and each solution for these puzzles would have served as a part of the next challenge. Sounds a bit like the beginning of a chain to me… These solutions would then be reported to a Byzantine fault-tolerant public register. Byzantine fault tolerance or BFT is a way to organize (in this case) a system of computers to address and defend against the failure of a system. He even created the concept and phrase “smart contracts” way back in 1993 because he had the goal of bringing “highly evolved” practices of contract law together with the design of electronic commerce protocols between strangers on the internet. Now we are seeing the huge growth of the implementation of smart contracts all over this crypto space with Ethereum and ERC20 tokens. As with a number of other individuals I’ve previously covered in this “Discovering Satoshi” series, Nick Szabo has been hounded by people trying to solve the mystery of identifying the anonymous Bitcoin creator who goes by or at the very least, went by Satoshi Nakamoto. Is it really even important anymore to put a face to the name? What should be more important and more highly valued is what was created, not who specifically created it. If you couldn’t tell already, I’m partial to learning more about a whole host of individuals who played a part in the creation and facilitation of this crypto space. Lucky for us, Nick Szabo has a lot of thoughts on things like economics, cryptography and other topics, he’s also a great writer. He’s got a blog that I think is very much worth checking out if you’re interested in expanding your knowledge library. You can find it at unenumerated.blogspot.com. His blog goes really in-depth and there’s a ton of material there for you to check out, he doesn’t post all too often, but when he does, it’s worth it.
Views: 3984 Crypto Tips
Dash: QT Wallet Encryption = G15E12
 
06:21
Dash: QT Wallet Encryption What is : https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325335 How to: https://dashpay.atlassian.net/wiki/pages/viewpage.action?pageId=33325343 Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 264 Dash
What is ID-BASED CRYPTOGRAPHY? What does ID-BASED CRYPTOGRAPHY mean? ID-BASED CRYPTOGRAPHY meaning
 
03:31
What is ID-BASED CRYPTOGRAPHY? What does ID-BASED CRYPTOGRAPHY mean? ID-BASED CRYPTOGRAPHY meaning - ID-BASED CRYPTOGRAPHY definition - ID-BASED CRYPTOGRAPHY explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Identity-based cryptography is a type of public-key cryptography in which a publicly known string representing an individual or organization is used as a public key. The public string could include an email address, domain name, or a physical IP address. The first implementation of identity-based signatures and an email-address based public-key infrastructure (PKI) was developed by Adi Shamir in 1984, which allowed users to verify digital signatures using only public information such as the user's identifier. Under Shamir's scheme, a trusted third party would deliver the private key to the user after verification of the user's identity, with verification essentially the same as that required for issuing a certificate in a typical PKI. Shamir similarly proposed identity-based encryption, which appeared particularly attractive since there was no need to acquire an identity's public key prior to encryption. However, he was unable to come up with a concrete solution, and identity-based encryption remained an open problem for many years. The first practical implementations were finally devised by Sakai in 2000, and Boneh and Franklin in 2001. These solutions were based on bilinear pairings. Also in 2001, a solution was developed independently by Clifford Cocks. Identity-based systems allow any party to generate a public key from a known identity value such as an ASCII string. A trusted third party, called the private key generator (PKG), generates the corresponding private keys. To operate, the PKG first publishes a master public key, and retains the corresponding master private key (referred to as master key). Given the master public key, any party can compute a public key corresponding to the identity ID by combining the master public key with the identity value. To obtain a corresponding private key, the party authorized to use the identity ID contacts the PKG, which uses the master private key to generate the private key for identity ID. Identity-based systems have a characteristic problem in operation. Suppose Alice and Bob are users of such a system. Since the information needed to find Alice's public key is completely determined by Alice's ID and the master public key, it is not possible to revoke Alice's credentials and issue new credentials without either (a) changing Alice's ID (usually a phone number or an email address which will appear in a corporate directory); or (b) changing the master public key and re-issusing private keys to all users, including Bob. This limitation may be overcome by including a time component (e.g. the current month) in the identity.
Views: 264 The Audiopedia
Dash: Bitcoin Rush - THE Darkcoin Show Jan 2015 = S15E01
 
20:33
Bitcoin Rush - THE Darkcoin Show Jan 18, 2015 featuring Evan Duffield Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 761 Dash
Dash: E. Voorhees + A. Antonopoulos comment on Altcoins at LaBitConf 2015 = M15E03
 
02:16
Eric Voorhees + Andreas Antonopoulos comment on Altcoins at LaBitConf 2015 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 636 Dash
Ever wonder how Bitcoin (and other cryptocurrencies) actually work?
 
26:21
Bitcoin explained from the viewpoint of inventing your own cryptocurrency. Videos like these made possible by patreon: https://patreon.com/3blue1brown Protocol Labs: https://protocol.ai/ Interested in contributing? https://protocol.ai/join/ Special thanks to the following patrons: http://3b1b.co/btc-thanks Some people have asked if this channel accepts contributions in cryptocurrency form as an alternative to Patreon. As you might guess, the answer is yes :). Here are the relevant addresses: ETH: 0x88Fd7a2e9e0E616a5610B8BE5d5090DC6Bd55c25 BTC: 1DV4dhXEVhGELmDnRppADyMcyZgGHnCNJ BCH: qrr82t07zzq5uqgek422s8wwf953jj25c53lqctlnw LTC: LNPY2HEWv8igGckwKrYPbh9yD28XH3sm32 Supplement video: https://youtu.be/S9JGmA5_unY Music by Vincent Rubinetti: https://soundcloud.com/vincerubinetti/heartbeat Here are a few other resources I'd recommend: Original Bitcoin paper: https://bitcoin.org/bitcoin.pdf Block explorer: https://blockexplorer.com/ Blog post by Michael Nielsen: https://goo.gl/BW1RV3 (This is particularly good for understanding the details of what transactions look like, which is something this video did not cover) Video by CuriousInventor: https://youtu.be/Lx9zgZCMqXE Video by Anders Brownworth: https://youtu.be/_160oMzblY8 Ethereum white paper: https://goo.gl/XXZddT If you want to contribute translated subtitles or to help review those that have already been made by others and need approval, you can click the gear icon in the video and go to subtitles/cc, then "add subtitles/cc". I really appreciate those who do this, as it helps make the lessons accessible to more people. Music by Vince Rubinetti: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that). If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended Various social media stuffs: Website: https://www.3blue1brown.com Twitter: https://twitter.com/3Blue1Brown Patreon: https://patreon.com/3blue1brown Facebook: https://www.facebook.com/3blue1brown Reddit: https://www.reddit.com/r/3Blue1Brown
Views: 2384670 3Blue1Brown
Protecting Bare-metal Embedded Systems with Privilege Overlays
 
18:51
Protecting Bare-metal Embedded Systems with Privilege Overlays Abraham A Clements (Purdue and Sandia National Labs) Presented at the 2017 IEEE Symposium on Security & Privacy May 22–24, 2017 San Jose, CA http://www.ieee-security.org/TC/SP2017/ ABSTRACT Embedded systems are ubiquitous in every aspect of modern life. As the Internet of Thing expands, our dependence on these systems increases. Many of these interconnected systems are and will be low cost bare-metal systems, executing without an operating system. Bare-metal systems rarely employ any security protection mechanisms and their development assumptions (unrestricted access to all memory and instructions), and constraints (runtime, energy, and memory) makes applying protections challenging. To address these challenges we present EPOXY, an LLVM-based embedded compiler. We apply a novel technique, called privilege overlaying, wherein operations requiring privileged execution are identified and only these operations execute in privileged mode. This provides the foundation on which code integrity, adapted control-flow hijacking defenses, and protections for sensitive IO are applied. We also design fine-grained randomization schemes, that work within the constraints of bare-metal systems to provide further protection against control-flow and data corruption attacks. These defenses prevent code injection attacks and ROP attacks from scaling across large sets of devices. We evaluate the performance of our combined defense mechanisms for a suite of 75 benchmarks and 3 real-world IoT applications. Our results for the application case studies show that EPOXY has, on average, a 1.8% increase in execution time and a 0.5% increase in energy usage.
Dash: QT Wallet TestNet Guide = G15E19
 
08:08
Dash: QT Wallet TestNet Guide This tutorial will help you run the latest Dash-qt client on Test-net. This video is mean't for Linux but can be used for Windows/Mac as well. You will just need to locate your dash.conf in the Dash Data directory. What is TestNet ? https://en.bitcoin.it/wiki/Testnet Tipping Address: Xovo9BEAN3sKwxAAt5Knqdo1gqhodnzNu7 Dash is DigitalCash Dash is a decentralized cryptographic currency that works similar to Bitcoin, but fixes many of Bitcoin's problems. Dash's InstantX technology makes transactions almost instant, meaning it is suitable for in-person trades and point-of-sale purchases. Not only that, but Dash is truly private, meaning that nobody can mine the blockchain to find details of your purchases or financial history. You wouldn't advertise your credit card statement--why advertise your crypto purchases? Dash is built from Bitcoin's core code, meaning that it remains compatible with systems that are already designed to work with Bitcoin. The creator of Dash, Evan Duffield, works with a "core team" of almost 20 people to continually improve the Dash code and ecosystem. Since Dash implemented its self-funding mechanism, a number of new developers have begun working on various aspects of the project as well, including retail point-of-sale and vending machine integration. Dash's masternodes enable investors to earn a 10+% annual return on investment while performing vital services for the network. Masternodes power both the privacy and instant transaction features of Dash. Not only that, but masternode owners are able to vote on which projects will receive Dash's monthly self-generated budget funding. Dash's budget system provides tens of thousands of dollars in recurring funds, every month, which masternode owners allocate to projects designed to improve the Dash ecosystem. https://www.dash.org
Views: 448 Dash
What is HOST IDENTITY PROTOCOL? What does HOST IDENTITY PROTOCOL mean?
 
02:01
What is HOST IDENTITY PROTOCOL? What does HOST IDENTITY PROTOCOL mean? HOST IDENTITY PROTOCOL meaning - HOST IDENTITY PROTOCOL definition - HOST IDENTITY PROTOCOL explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ The Host Identity Protocol (HIP) is a host identification technology for use on Internet Protocol (IP) networks, such as the Internet. The Internet has two main name spaces, IP addresses and the Domain Name System. HIP separates the end-point identifier and locator roles of IP addresses. It introduces a Host Identity (HI) name space, based on a public key security infrastructure. The Host Identity Protocol provides secure methods for IP multihoming and mobile computing. In networks that implement the Host Identity Protocol, all occurrences of IP addresses in applications are eliminated and replaced with cryptographic host identifiers. The cryptographic keys are typically, but not necessarily, self-generated. The effect of eliminating IP addresses in application and transport layers is a decoupling of the transport layer from the internetworking layer (Internet Layer) in TCP/IP. HIP was specified in the IETF HIP working group. An Internet Research Task Force (IRTF) HIP research group looks at the broader impacts of HIP. The working group is chartered to produce Requests for Comments on the "Experimental" track, but it is understood that their quality and security properties should match the standards track requirements. The main purpose for producing Experimental documents instead of standards track ones are the unknown effects that the mechanisms may have on applications and on the Internet in the large.
Views: 406 The Audiopedia
Cryptography Concepts - CompTIA Security+ SY0-501 - 6.1
 
07:52
Security+ Training Course Index: http://professormesser.link/sy0501 Professor Messer’s Course Notes: http://professormesser.link/501cn Frequently Asked Questions: http://professormesser.link/faq - - - - - The basics of cryptography are valuable fundamentals for building a secure network. In this video, you’ll learn about cryptographic terms, the value of the key, the concepts of confusion and diffusion, and more. - - - - - Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 20071 Professor Messer
Public Key Cryptography: Diffie-Hellman Key Exchange (short version)
 
05:24
This is a segment of this full video: https://www.youtube.com/watch?v=YEBfamv-_do Diffie-Hellman key exchange was one of the earliest practical implementations of key exchange within the field of cryptography. It relies on the discrete logarithm problem. This test clip will be part of the final chapter of Gambling with Secrets!
Views: 445482 Art of the Problem

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