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03:36
This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 40283 Udacity

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: 61816 MIT OpenCourseWare

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Views: 417984 itfreetraining

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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: 20294 CRI

01:02:27
Over the past few decades, physicists have discovered a phenomenon that operates outside the confines of space and time: nonlocality - the ability of two particles to act in harmony no matter how far apart they may be. Einstein grappled with this oddity and couldn't come to terms with it, describing it as "spooky action at a distance." More recently, the mystery has deepened as other forms of nonlocality have been uncovered. This strange occurrence, which has direct connections to black holes, particle collisions, and even the workings of gravity, holds the potential to undermine our most basic understandings of physical reality. If space isn't what we thought it was, then what is it? In this talk "Spooky Action at a Distance: The Phenomenon That Reimagines Space and Time--and What It Means for Black Holes, the Big Bang, and Theories of Everything", George Musser sets out to answer that question, offering a provocative exploration of nonlocality and a celebration of the scientists who are trying to explain it. He traces the often contentious debates over nonlocality through major discoveries and disruptions of the twentieth century and shows how scientists faced with the same undisputed experimental evidence develop wildly different explanations for that evidence.

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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: 700482 Paul Programming

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.

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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: 20 The Audiopedia

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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: 197031 Chainthat

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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: 261 The Audiopedia

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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: 19 The Audiopedia

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While previous research has applied environmental life-cycle assessment (LCA) to solid waste management (SWM) using formal search techniques, existing models are either not readily generalizable and scalable, or optimize only a single time period and do not consider changes likely to affect SWM over time, such as new policy and technology innovation. The Solid Waste Optimization Life-cycle Framework (SWOLF) presents the first life cycle-based framework to optimize—over multiple time stages—the collection and treatment of all waste materials from curb to final disposal by minimizing cost and environmental impacts, while considering user-defined emissions, waste diversion constraints and future changes in energy and GHG prices. Specifically, the framework allows for the cost of energy and emissions to change over time in response to policy changes (e.g., cap and trade, carbon tax). The framework considers the use of existing SWM infrastructure as well as the deployment and utilization of new infrastructure. SWOLF was used to illustrate how a typical suburban U.S. city can proactively and sustainably adapt their SWM system over the next 30 years including potential changes in the energy system.
Views: 551 ISWM NCSU

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Zcoin is the first cryptocurrency to successfully code MTP from the ground up and implement it. MTP is an algorithm that offers a memory hard proof of work that remains lightweight to verify thus promoting a decentralized and scalable network. https://www.zcoin.io Bitcointalk thread: https://bitcointalk.org/index.php?topic=1638450.0
Views: 7283 Zcoin

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Views: 277 The Audiopedia

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Privacy enhanced mail in more detail sciencedirect. What is privacy enhanced mail? Youtubeprivacy mail youtube. Rfc 1421 prescribes protocol privacy enhanced mail (pem) consists of extensions to existing message processing software plus a key management infrastruc ture. Ripem allows electronic mail to have the four security facilities acknowledgements this document is outgrowth of a series meetings privacy and research group (psrg) irtf pem enhanced. They include originator authentication, (optional) message confidentiality, and data integrity description of pem (privacy enhanced mail) from tom sheldon's encyclopedia networking telecommunications privacy mail is a standard format for encryption signature's in electronic messages, using asymmetric encryption, public key's private 28 aug 2017 this document will make you understand the basic issues related to e like, spamming, bombing, malware, email spoofing 30 dec 2009 (pem) an internet provide secure over house communication infrastructures sep. Pem provides a range of security features. Abstract the progress of work at university college london in implementing a prototype model privacy enhanced internet mail, published by acm 1993 articlecitation count 28 downloads (cumulative) 1,686 Privacy electronic mail wikipedia. These combine to provide privacy enhanced mail (pem), is a 1993 ietf proposal for securing email using public key cryptography. Rfc 1421 privacy enhancement for internet electronic mail part i enhanced ieee conference publication. Internet privacy enhanced mail acsac. Privacy enhanced mail (pem) umbc cseee security pgp (pretty good privacy) & pem (privacy mail) (linktionary term) linktionary. Pem, privacy enhanced mail network sorcery. Although pem became an ietf proposed standard it keywords security, privacy enhanced mail, public key cryptology, pem, certificate, certification authoritywithin the internet, number of 19 dec 1997 riordan's internet mail (ripem) is implementation. E mail security protocol 1 privacy enhanced (pem) protocollogical. Pem employs a range of cryptographic techniques to allow for confidentiality, sender authentication, and message integrity 7 jul 2006 [note on terminology the term 'privacy enhanced mail' is name an early internet standard. Privacy enhanced mail standard 13 youtube. Relevant mechanisms ''6 mar 2015a series of documents defining privacy enhancement for electronic mail transferred using internet protocols. Privacy enhanced mail is a set of protocols and mechanisms providing confidentiality authentication for internet electronic. What are kerberos, pgp, pem, ssl, s and ipsec? . Definition of privacy enhanced mail hitachi id. Internet privacy enhanced mail. Privacy enhanced mail (pem) is an internet standard that provides for secure exchange of electronic. Privacy enhanced electronic mail wikipedia. I'm using it in a more generic sense to refer privacy enhanced mail (pem) is an internet standard that provides for secure exchange of electronic.

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What is a blockchain and how do they work? I'll explain why blockchains are so special in simple and plain English! 💰 Want to buy Bitcoin or Ethereum? Buy for \$100 and get \$10 free (through my affiliate link): https://www.coinbase.com/join/59284524822a3d0b19e11134 📚 Sources can be found on my website: https://www.savjee.be/videos/simply-explained/how-does-a-blockchain-work/ 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be ✉️ Subscribe to newsletter: https://goo.gl/nueDfz 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Views: 2009767 Simply Explained - Savjee

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Views: 3396 Crypto Tips

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http://CppCon.org — Presentation Slides, PDFs, Source Code and other presenter materials are available at: https://github.com/CppCon/CppCon2017 — Hash tables consume a large volume of both compute resources and memory across Google's production system. The design for hash tables in C++ traces its origins to the SGI STL implementation from 20 years ago. Over these years, computer architecture and performance has changed dramatically and we need to evolve this fundamental data structure to follow those changes. This talk describes the process of design and optimization that starts with std::unordered_map and ends with a new design we call "SwissTable", a 2-level N-way associative hash table. Our implementation of this new design gets 2-3x better performance with significant memory reductions (compared to unordered_map) and is being broadly deployed across Google. — Matt Kulukundis: Google, Senior Software Engineer Matt is a senior software engineer on the C++ libraries team at Google. Prior to Google he has worked on compilers, machine learning, and underwater robotics. In his free time, he scuba dives in warm places. — Videos Filmed & Edited by Bash Films: http://www.BashFilms.com
Views: 14368 CppCon

06:51
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: 294249 saurabhschool

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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: 435574 Art of the Problem

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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: 2929 Dash

01:21:51
MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Erik Demaine In this lecture, Professor Demaine reviews hashing in the context of randomized algorithms. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 21432 MIT OpenCourseWare

02:26
Dash: QT Wallet CheckSum 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: 107 Dash

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Views: 10550 Professor Messer

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Over the past decade, an alternative digital paradigm has slowly been taking shape at the edges of the internet. This new paradigm is the blockchain. After incubating through millions of Bitcoin transactions and a host of developer projects, it is now on the tips of tongues of CEOs and CTOs, startup entrepreneurs, and even governance activists. Though these stakeholders are beginning to understand the disruptive potential of blockchain technology and are experimenting with its most promising applications, few have asked a more fundamental question: What will a world driven by blockchains look like a decade from now? Learn more: http://www.iftf.org/blockchainfutureslab Contact us: http://www.iftf.org/blockchainfutureslab/contact

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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: 5562997 CuriousInventor

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Lecture Series on Internet Technologies by Prof.I.Sengupta, Department of Computer Science & Engineering ,IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 102253 nptelhrd

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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: 4865 Dash

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Views: 2170089 3Blue1Brown

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Views: 103 KirkpatrickPrice

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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: 107 The Audiopedia

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: 14604 MIT OpenCourseWare

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Views: 411 Dash

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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: 291 Dash

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: 21421 Dash

22:25
A somewhat technical explanation of 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. Shorter 5 min introduction: https://www.youtube.com/watch?v=t5JGQXCTe3c Written version: http://www.imponderablethings.com/2013/07/how-bitcoin-works-under-hood.html My Bitcoin address: 13v8NB9ScRa21JDi86GmnZ5d8Z4CjhZMEd Arabic translation by Ahmad Alloush Spanish caption translation by Borja Rodrigo, [email protected], DFJWgXdBCoQqo4noF4fyVhVp8R6V62XdJx Russian caption translation by Alexandra Miklyukova Italian voice over: http://youtu.be/1aEf3qr7UdE Italian captions translated by Simone Falcini, 1H5KdCnBooxfqpXtyQBBAKKRU7MkCZCVCe
Views: 2599698 CuriousInventor

01:26:40
Award-winning sci-fi author Neal Stephenson, who is also the chief futurist at Magic Leap, in conversation with Ariel Ekblaw, founder and lead of the Media Lab's Space Exploration Initiative, and Joe Paradiso, head of the Responsive Environments research group. #MLTalks More information at:https://www.media.mit.edu/events/mltalks-stephenson/ License: CC-BY-4.0 (https://creativecommons.org/licenses/by-nc/4.0/)
Views: 3183 MIT Media Lab

01:48
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: 1211 Dash

52:52
Many blame today's economic inequality, stagnation, and political instability on the free market. The solution is to rein in the market, right? Radical Markets turns this thinking — and pretty much all conventional thinking about markets, both for and against — on its head. The book reveals bold new ways to organize markets for the good of everyone. It shows how the emancipatory force of genuinely open, free, and competitive markets can reawaken the dormant nineteenth-century spirit of liberal reform and lead to greater equality, prosperity, and cooperation. Eric Posner and Glen Weyl demonstrate why private property is inherently monopolistic, and how we would all be better off if private ownership were converted into a public auction for public benefit. They show how the principle of one person, one vote inhibits democracy, suggesting instead an ingenious way for voters to effectively influence the issues that matter most to them. They argue that every citizen of a host country should benefit from immigration—not just migrants and their capitalist employers. They propose leveraging antitrust laws to liberate markets from the grip of institutional investors and creating a data labor movement to force digital monopolies to compensate people for their electronic data. Only by radically expanding the scope of markets can we reduce inequality, restore robust economic growth, and resolve political conflicts. But to do that, we must replace our most sacred institutions with truly free and open competition—Radical Markets shows how. Moderated by Hal Varian. Get the book: https://goo.gl/kfASr6

01:38:53
Secure Random By Default Dan Kaminsky Chief Scientist, White Ops As a general rule in security, we have learned that the best way to achieve security is to enable it by default. However, across operating systems and languages, random number generation is always exposed via two separate and most assuredly unequal APIs -- insecure and default, and secure but obscure. Why not fix this? Why not make JavaScript and PHP and Java and Python and even libc rand() return strong entropy? What are the issues stopping us? Should we just shell back to /dev/urandom, or is there merit to userspace entropy gathering? How does fork() and virtualization impact the question? What of performance, and memory consumption, and headless machines? Turns out the above questions are not actually rhetorical. Just because a change might be a good idea doesn't mean it's a simple one. This will be a deep dive, but one that I believe will actually yield a fix for the repeated *real world* failures of random number generation systems. Dan Kaminsky has been a noted security researcher for over a decade, and has spent his career advising Fortune 500 companies such as Cisco, Avaya, and Microsoft.Dan spent three years working with Microsoft on their Vista, Server 2008, and Windows 7 releases. Dan is best known for his work finding a critical flaw in the Internet’s Domain Name System (DNS), and for leading what became the largest synchronized fix to the Internet’s infrastructure of all time. Of the seven Recovery Key Shareholders who possess the ability to restore the DNS root keys, Dan is the American representative. Dan is presently developing systems to reduce the cost and complexity of securing critical infrastructure.
Views: 24049 DEFCONConference

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: 260 Dash

48:16
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: 2397 Christiaan008

07:01
Views: 246 The Audiopedia

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: 879 Dash

01:26
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: 381 Dash

08:28
Views: 53 AR Official

01:01:28