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The Math Needed for Computer Science
 
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►Support the Channel Patreon: https://patreon.com/majorprep PayPal: https://www.paypal.me/majorprep Computer science majors have to learn a different kind of math compared to MOST other majors (with the exception of math majors, plus computer and software engineers). This kind of math is important especially for those looking to go into research in fields like computer science, A.I., or even pure mathematics. Join Facebook Group: https://www.facebook.com/groups/majorprep/ Follow MajorPrep on Twitter: https://twitter.com/MajorPrep1 ►Check out the MajorPrep Amazon Store: https://www.amazon.com/shop/majorprep *************************************************** ► For more information on math, science, and engineering majors, check us out at https://majorprep.com Best Ways to Contact Me: Facebook, twitter, or email ([email protected])
Views: 347426 MajorPrep
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: 231829 CrashCourse
Cryptography For Beginners
 
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Cryptography is a complex and confusing subject. In this talk you will learn about the core components of cryptography used in software development: securing data with encryption, ensuring data integrity with hashes and digital signatures, and protecting passwords with key derivation functions. While learning how to use these components, you will also learn the best practices that drive strong cryptography. This talk won’t make you a cryptography expert but it will give you the knowledge necessary to use cryptography properly. No prior knowledge of cryptography is required for this presentation. EVENT: Dutch PHP Conference in 2018 SPEAKER: Adam Englander PERMISSIONS: Original video was published with the Creative Commons Attribution license (reuse allowed). CREDITS: Original video source: https://www.youtube.com/watch?v=KcjJ19geKmA
Views: 45520 Coding Tech
Cryptography: Transposition Cipher
 
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This lesson explains how to encrypt and decrypt a message using a transposition cipher. Site: http://mathispower4u.com
Views: 66127 Mathispower4u
105 Math and Cryptography Sam Gross
 
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These are the videos from Bloomcon 2017: http://www.irongeek.com/i.php?page=videos/bloomcon2017/mainlist
Views: 284 Adrian Crenshaw
Cryptography Android App
 
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✴ Cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages; various aspects in information security such as data confidentiality, data integrity, authentication, and non-repudiation are central to modern cryptography. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, electrical engineering, communication science, and physics. Applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications.✴ https://play.google.com/store/apps/details?id=in.softecks.cryptography ► This App is meant for students of computer science who aspire to learn the basics of cryptography. It will be useful for networking professionals as well who would like to incorporate various cryptographic algorithms to ensure secure data communication over their networks.✦ 【Topics Covered in this App are Listed Below】 ⇢ Origin of Cryptography ⇢ Modern Cryptography ⇢ Cryptosystems ⇢ Attacks On Cryptosystems ⇢ Traditional Ciphers ⇢ Modern Symmetric Key Encryption ⇢ Block Cipher ⇢ Feistel Block Cipher ⇢ Data Encryption Standard ⇢ Triple DES ⇢ Advanced Encryption Standard ⇢ Block Cipher Modes of Operation ⇢ Public Key Encryption ⇢ Data Integrity in Cryptography ⇢ Cryptography Hash functions ⇢ Message Authentication ⇢ Cryptography Digital signatures ⇢ Public Key Infrastructure ⇢ Cryptography Benefits & Drawbacks
Views: 340 10 Up's.!
Mathematical Cryptography
 
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What a cryptography is. How Mathematics is applied for encryption and decryption. What Magic Square is. How to calculate a magic constant. Application of mathematical cryptography.
Views: 1423 Aizhan Akhmetbek
Data Security using Cryptography and Steganography | Matlab Final Year Project
 
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Data Security using Cryptography and Steganography| Matlab Final Year Project To get this project in ONLINE or through TRAINING Sessions, Contact: JP INFOTECH, #37, Kamaraj Salai,Thattanchavady, Puducherry -9. Mobile: (0)9952649690, Email: [email protected], Website: https://www.jpinfotech.org As use of computer networks and internet is growing very fast and admiring day by day, information security is become a major concern in computer networks. There is always risk in violation of network security which leads a need of an efficient and simple way of securing the electronic documents from being read or used by people other than who are authorized to do it. Encryption is one of the security technique widely used to ensure secrecy. Encryption is an entirely mathematical process that takes in data, performs some predefined mathematical operations on the data, and then outputs the result. In this paper, we propose Elliptical curve cryptography algorithm for data encryption. Elliptical curve cryptography (ECC) is a public key encryption technique based on elliptic curve theory that can be used to create faster, smaller, and more efficient cryptographic keys. However if any eavesdropper detects the presence of encrypted data he or she can try several attacks in order to get the original data. So there is a need to provide a three layer approach for better security. That’s why this work presents a security system using combination of cryptography and steganography to enhance the security and for authentication purpose, use Diffie-Hellman key exchange algorithm.
Views: 67 jpinfotechprojects
Crypto Mini-project
 
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https://asecuritysite.com/public/lab_mini_project.pdf
Views: 243 Bill Buchanan OBE
One Time Pad - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 45213 Udacity
Python Encryption Tutorial with PyCrypto
 
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Sentdex.com Facebook.com/sentdex Twitter.com/sentdex How to use python to encrypt sensitive information, and later decrypt it, using PyCrypto! PyCrypto: https://www.dlitz.net/software/pycrypto/ The Code: http://sentdex.com/sentiment-analysisbig-data-and-python-tutorials/encryption-and-decryption-in-python-code-example-with-explanation/
Views: 88702 sentdex
RSA Algorithm with solved example using extended euclidean algorithm | CSS series #7
 
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#rsa #deffiehellman #cryptographylectures #lastmomenttuitions Take the Full Course of Cryptography and Network Security What we Provide 1) 20 Videos (Index is given down) + More Update will be Coming Before final exams 2)Hand made Notes with problems for your to practice 3)Strategy to Score Good Marks in Cryptography and Network Scurity To buy the course click https://goo.gl/mpbaK3 if you have any query email us at [email protected] Sample Notes : https://goo.gl/Ze1FpX or Fill the form we will contact you https://goo.gl/forms/2SO5NAhqFnjOiWvi2 Cryptography and System Security Index Lecture 1 Introduction to Cryptography and Security System Lecture 2 Security Goals and Mechanism Lecture 3 Symmetric Cipher Lecture 4 Substitution Cipher Lecture 5 Transposition Cipher Lecture 6 Stream and Block Cipher Lecture 7 Mono Alphabetic Cipher Lecture 8 Poly Alphabetic Cipher Lecture 9 Diffie Hellman Lecture 10 RSA Algorithm with Solved Example Lecture 11 IDEA Algorithm Full Working Lecture 12 SHA-1 Algorithm Full Working Lecture 13 Blowfish Algorithm Full working Lecture 14 DES Algorithm Full Working Lecture 15 Confusion and Diffusion Lecture 16 AES Algorithm Full working Lecture 17 Kerberos Lecture 18 Malicious Software ( Virus and worms ) Lecture 19 DOS and DDOS Attack Lecture 20 Digital Signature Full working Explained More videos Coming Soon.
Views: 316718 Last moment tuitions
How Bitcoin mining actually works - What is the "cryptographic puzzle"?
 
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In this video I try to breakdown the "cryptographic problem" that people reference when they talk about bitcoin mining. 13uJjYF12aRVdwaiTmALx5XDfguQ9MnYtK
Views: 67172 Keifer Kif
Public Key Cryptography: RSA Encryption Algorithm
 
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RSA Public Key Encryption Algorithm (cryptography). How & why it works. Introduces Euler's Theorem, Euler's Phi function, prime factorization, modular exponentiation & time complexity. Link to factoring graph: http://www.khanacademy.org/labs/explorations/time-complexity
Views: 582328 Art of the Problem
Cryptography 101
 
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Cryptography is a complex and confusing subject. In this talk you will learn about the core components of cryptography used in software development: securing data with encryption, ensuring data integrity with hashes and digital signatures, and protecting passwords with key derivation functions. While learning how to use these components, you will also learn the best practices that drive strong cryptography. This talk won’t make you a cryptography expert but it will give you the knowledge necessary to use cryptography properly. No prior knowledge of cryptography is required for this presentation. EVENT: the Dutch PHP Conference in 2018 SPEAKER: Adam Englander PERMISSIONS: Original video was published with the Creative Commons Attribution license (reuse allowed). CREDITS: Original video source: https://www.youtube.com/watch?v=KcjJ19geKmA&t=1s
Views: 7589 Coding Tech
Applied Cryptography: AES - Part 3
 
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Previous video: https://youtu.be/-RdG8ZHc1NI Next video: https://youtu.be/5xyUaWhE4tQ
Views: 527 Leandro Junes
Hashing Algorithms and Security - Computerphile
 
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Audible free book: http://www.audible.com/computerphile Hashing Algorithms are used to ensure file authenticity, but how secure are they and why do they keep changing? Tom Scott hashes it out. More from Tom Scott: http://www.youtube.com/user/enyay and https://twitter.com/tomscott http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Pigeon Sound Effects courtesy of http://www.freesfx.co.uk/ Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels
Views: 787230 Computerphile
Symmetric Key and Public Key Encryption
 
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Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 496771 itfreetraining
[CB17] Key recovery attacks against commercial white-box cryptography implementations
 
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White-box cryptography aims to protect cryptographic primitives and keys in software implementations even when the adversary has a full control to the execution environment and an access to the implementation of the cryptographic algorithm. It combines mathematical transformation with obfuscation techniques so it’s not just obfuscation on a data and a code level but actually algorithmic obfuscation. ​ In the white-box implementation, cryptographic keys are mathematically transformed so that never revealed in a plain form, even during execution of cryptographic algorithms. With such security in the place, it becomes extremely difficult for attackers to locate, modify, and extract the cryptographic keys. Although all current academic white-box implementations have been practically broken by various attacks including table-decomposition, power analysis attack, and fault injection attacks, There are no published reports of successful attacks against commercial white-box implementations to date. When I have assessed Commercial white box implementations to check if they were vulnerable to previous attacks, I found out that previous attacks failed to retrieve a secret key protected with the commercial white-box implementation. Consequently, I modified side channel attacks to be available in academic literature and succeeded in retrieving a secret key protected with the commercial white-box cryptography implementation. This is the first report that succeeded to recover secret key protected with commercial white-box implementation to the best of my knowledge in this industry. In this talk, I would like to share how to recover the key protected with commercial white-box implementation and present security guides on applying white-box cryptography to services more securely. Sanghwan Ahn I am a senior security engineer currently working in the security department at LINE corp and mostly engaged in security assessment, security architecture design and development. I like to analyze the program and find vulnerabilities in it also, am interested in technology related to security. In recent years, I have been interested in white-box cryptography doing various researches such as implementation, cryptanalysis.
Java Cryptography Tutorials 3 RSA Encryption and Decryption in Java
 
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In this video you will see how to encrypt and decrypt the text information using the RSA algorithm in Java Cryptography. For more tutorials visit: http://www.step2know.com
Views: 24323 Amarnath R
Computer-Aided Security Proofs for the Working Cryptographer (Crypto 2011)
 
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Gilles Barthe, Benjamin Grégoire, Sylvain Heraud, and Santiago Zanella Béguelin IMDEA Software Institute, Madrid, Spain; INRIA Sophia Antipolis-Méditerranée, France; INRIA Sophia Antipolis-Méditerranée, France; and IMDEA Software Institute, Madrid, Spain Abstract. We present EasyCrypt, an automated tool for elaborating security proofs of cryptographic systems from proof sketches—compact, formal representations of the essence of a proof as a sequence of games and hints. Proof sketches are checked automatically using off-the-shelf SMT solvers and automated theorem provers, and then compiled into verifiable proofs in the CertiCrypt framework. The tool supports most common reasoning patterns and is significantly easier to use than its predecessors. We argue that EasyCrypt is a plausible candidate for adoption by working cryptographers and illustrate its application to security proofs of the Cramer-Shoup and Hashed ElGamal cryptosystems.
Views: 901 TheIACR
Digital Signature Full concept + 3 love story in Hindi | Cryptography and Network security  lectures
 
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Take the Full Course of Cryptography and Network Security What we Provide 1) 20 Videos (Index is given down) + More Update will be Coming Before final exams 2)Hand made Notes with problems for your to practice 3)Strategy to Score Good Marks in Cryptography and Network Scurity To buy the course click https://goo.gl/mpbaK3 if you have any query email us at [email protected] Sample Notes : https://goo.gl/Ze1FpX or Fill the form we will contact you https://goo.gl/forms/2SO5NAhqFnjOiWvi2 Cryptography and System Security Index Lecture 1 Introduction to Cryptography and Security System Lecture 2 Security Goals and Mechanism Lecture 3 Symmetric Cipher Lecture 4 Substitution Cipher Lecture 5 Transposition Cipher Lecture 6 Stream and Block Cipher Lecture 7 Mono Alphabetic Cipher Lecture 8 Poly Alphabetic Cipher Lecture 9 Diffie Hellman Lecture 10 RSA Algorithm with Solved Example Lecture 11 IDEA Algorithm Full Working Lecture 12 SHA-1 Algorithm Full Working Lecture 13 Blowfish Algorithm Full working Lecture 14 DES Algorithm Full Working Lecture 15 Confusion and Diffusion Lecture 16 AES Algorithm Full working Lecture 17 Kerberos Lecture 18 Malicious Software ( Virus and worms ) Lecture 19 DOS and DDOS Attack Lecture 20 Digital Signature Full working Explained More videos Coming Soon.
Views: 30673 Last moment tuitions
Encryption and public keys | Internet 101 | Computer Science | Khan Academy
 
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Mia Epner, who works on security for a US national intelligence agency, explains how cryptography allows for the secure transfer of data online. This video explains 256-bit encryption, public and private keys, SSL & TLS and HTTPS. Watch the next lesson: https://www.khanacademy.org/computing/computer-science/internet-intro/internet-works-intro/v/the-internet-cybersecurity-and-crime?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/internet-intro/internet-works-intro/v/the-internet-http-and-html?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: 144612 Khan Academy
The Math Major
 
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This video covers the math major including applied math vs pure math, courses you'll take, and careers you can go into. The math major in undergrad involves a lot of the same classes whether you go into applied math or pure math include Calculus, linear algebra, differential equations, proofs, abstract algebra, real analysis, and more. But you will be able to take electives in pure or applied math concepts. Pure math is about using math to solve problems in math. Then applied math is about using math to solve problems outside of math (such as physics, engineering, finance, chemistry, biology, etc). Many pure math students end up getting their PhD so they can work in academia on research. Overall math students can go into a variety of fields including engineering, software development, teaching, finance, and more. Applied Math Courses: https://www.youtube.com/watch?v=mRxsfgilBKY *************************************************** ► For more information on math, science, and engineering majors, check us out at https://majorprep.com *************************************************** ► Patreon: https://patreon.com/majorprep ► PayPal: https://www.paypal.me/majorprep ► Facebook: https://facebook.com/majorprep
Views: 188102 MajorPrep
Public Key Cryptography w/ JAVA  (tutorial 01) - Diffie-Hellman Key Exchange
 
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Website + download source code @ http://www.zaneacademy.com | typo in server display corrected here https://youtu.be/6C5sq5TaVMs?t=90 00:08 demo prebuilt version of the application 04:20 what discrete logarithm problem(s) does Eve need to solve [typo correction in server console] s(congruent)B^a mod p [typo correction in server console] s(congruent)A^b mod p 05:00 quick intro to Diffie Hellman Key Exchange (DHKE) 06:00 what is a group 7:30 what is a cyclic group 7:50 what is a group generator 09:08 DHKE proof 10:12 what is the Discrete Logarithm Problem 10:51 what is the Diffie Hellman Problem 11:55 what is the generalized discrete logarithm problem 12:55 why 1 and p-1 are not included when picking the secret keys for both parties 14:30 start coding the application 17:35 coding the server side 22:25 coding the client side 26:54 initializing the domain params p and alpha 27:58 calculating the public key 28:45 calculating the common key 29:56 test running the application [typo correction in server console] s (congruent) B^a mod p [typo correction in server console] s (congruent) A^b mod p
Views: 1916 zaneacademy
Side Channel Analysis of Cryptographic Implementations
 
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Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 6009 nptelhrd
[HINDI] What is Cryptography? | Simple Practical in Android | Cryptography क्या होता है?
 
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Link to My Blog:- http://techdjdey.blogspot.in/ Video Editor used:- HitFilm 4 Express. https://hitfilm.com/ Screen recorder used:- iSpring Free Cam 8. https://www.ispringsolutions.com/ispring-free-cam Music:- Elektronomia-Sky High. https://www.youtube.com/watch?v=TW9d8vYrVFQ PLEASE LIKE AND SHARE THIS VIDEO. SUBSCRIBE to my Channel here:- https://www.youtube.com/channel/UCFKcqq9IOdwHdgfq6GEL8gw?sub_confirmation=1 My other videos:- https://www.youtube.com/channel/UCFKcqq9IOdwHdgfq6GEL8gw/videos IGNORE THESE BELOW: 1. what is the difference between steganography and cryptography c cryptography c cryptography example c cryptography library c cryptography tutorial cryptographic protocol e cryptography f# cryptography lightweight cryptography nonlinear cryptography o cryptography r cryptography what does cryptography have to do with math what does cryptography look like today what is a certificate in cryptography what is a cipher in cryptography what is a crib in cryptography what is a generator cryptography what is a hash cryptography what is a nonce in cryptography what is a public key cryptography what is a quantum cryptography what is a seed in cryptography what is a symmetric cryptography what is advantages of cryptography what is asymmetric key cryptography what is biometric cryptography what is bitcoin cryptography what is broken cryptography what is cbc cryptography what is chaos cryptography what is chaotic cryptography what is cipher cryptography what is classical cryptography what is cloud cryptography what is confusion and diffusion in cryptography with example what is conventional cryptography what is cryptographic hash function what is cryptographic hash functions examples what is cryptography what is cryptography algorithm what is cryptography and cryptanalysis what is cryptography and encryption what is cryptography and history what is cryptography and how is it used what is cryptography and how is it used in it security what is cryptography and its importance what is cryptography and its types what is cryptography and network security what is cryptography and network security ppt what is cryptography and network security wikipedia what is cryptography and number theory what is cryptography and steganography what is cryptography and theoretical informatics what is cryptography and why is it important what is cryptography and why is it used what is cryptography basics what is cryptography computer what is cryptography define the process of encryption and decryption what is cryptography definition what is cryptography doc what is cryptography encryption what is cryptography engineering what is cryptography error what is cryptography explain what is cryptography explain in detail what is cryptography explain its types what is cryptography hashing what is cryptography how is it used in it security what is cryptography in .net what is cryptography in c# what is cryptography in computer what is cryptography in computer network what is cryptography in computer security what is cryptography in cyber security what is cryptography in hindi what is cryptography in information security what is cryptography in java what is cryptography in mathematics what is cryptography in network security what is cryptography in networking what is cryptography in operating system what is cryptography in os what is cryptography in registry what is cryptography in security what is cryptography in simple language what is cryptography in web security what is cryptography key what is cryptography key management what is cryptography law what is cryptography library what is cryptography method what is cryptography module what is cryptography network security what is cryptography next generation what is cryptography pdf what is cryptography ppt what is cryptography provide an example what is cryptography quora what is cryptography rng seed what is cryptography salary what is cryptography salt what is cryptography service what is cryptography slideshare what is cryptography software what is cryptography system what is cryptography teach ict what is cryptography technique what is cryptography technology what is cryptography tools what is cryptography tutorial point what is cryptography types what is cryptography used for what is cryptography used for today what is cryptography video what is cryptography virus what is cryptography wikipedia what is cryptography with diagram what is cryptography with example what is cryptography yahoo what is cryptography yahoo answers what is cryptography youtube what is data cryptography what is des cryptography what is difference between cryptography and encryption what is difference between cryptography and steganography what is diffusion cryptography what is digital cryptography what is discrete logarithm in cryptography what is distributed cryptography what is dna cryptography what is dsa cryptography what is ecc cryptography what is elementary cryptography
Views: 2484 Dhrubajyoti Dey
Cryptography for Programmers - Daniel James [ACCU 2018]
 
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WE ARE SORRY FOR THE POOR AUDIO IN THIS TALK, THE MIC FAILED AT THE START OF THE TALK LEAVING ONLY THE ONBOARD CAMERA AUDIO - WE HAVE TRIED TO CLEAN IT UP AS BEST WE CAN. In an increasingly hostile world security is becoming more and more important in today’s software design. Increasing regulation also means that security measures are mandated in the design of new software. Many programmers, however, are unfamiliar with security concepts and jargon, and find the learning curve challenging. This talk will give an introduction to cryptographic techniques and an overview of the use of cryptography in software. It is aimed at programmers, not at mathematicians or at cryptographers. The talk will be language-agnostic, but will include some discussion of common cryptographic APIs, which are typically written to be C-callable.
Views: 742 ACCU Conference
Programming with Math (Exploring Type Theory)
 
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As programs are getting more complex, it's time to go back to basics, to the old well tested approach to complexity called mathematics. Let compilers deal with the intricacies of Turing machines. Our strength is abstract thinking. Let's use it! EVENT: Øredev 2018 SPEAKER: Bartosz Milewski PERMISSIONS: Conference Organizer provided Coding Tech with the permission to republish this video.
Views: 19542 Coding Tech
The Mathematics of Side-Channel Attacks
 
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We will look at a collection of mathematical problems suggested by side-channel attacks against public key cryptosystems, and how the techniques inspired by this work relate to a variety of different applications. First, we discuss the cold boot attack, a side-channel attack against disk encryption systems that uses the phenomenon of DRAM remanence to recover encryption keys from a running computer. In the course of the attack, however, there may be errors introduced in the keys that the attacker obtains. It turns out that the structure of the key data in an AES key schedule can allow an attacker to more efficiently recover the private key in the presence of such errors. We extend this idea to a RSA private keys, and show how the structure of RSA private key data can allow an attacker to recover a key in the presence of random errors from 27 of the bits of the original key. Most previous work on RSA key recovery used the lattice-based techniques introduced by Coppersmith for finding low-degree roots of polynomials modulo numbers of unknown factorization. We will show how powerful analogies from algebraic number theory allow us to translate this theorem from the ring of integers to the ring of polynomials and beyond. This sort of intellectual arbitrage allows us to give a faster algorithm for list decoding of Reed-Solomon codes along with a natural extension to multi-point algebraic geometric codes, as well as an algorithm to find small solutions to polynomials over ideals in number fields.
Views: 1199 Microsoft Research
35C3 -  The year in post-quantum crypto - deutsche Übersetzung
 
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https://media.ccc.de/v/35c3-9926-the_year_in_post-quantum_crypto The world is finally catching on to the urgency of deploying post-quantum cryptography: cryptography designed to survive attacks by quantum computers. NIST's post-quantum competition is in full swing, and network protocols are exploring post-quantum extensions. This talk will take the audience on a journey through selected recent highlights from the post-quantum world. Post-quantum cryptography has become one of the most active areas in cryptography, trying to address important questions from potential users. Is post-quantum cryptography secure? In the first ten months of this year we have seen several serious breaks of submissions to the NIST competition. At this point, out of the original 69 submissions, 13 are broken and 8 are partially broken. Are the remaining 48 submissions all secure? Or is this competition a denial-of-service attack against the cryptanalysis community? NIST will select fewer candidates for the 2nd round, but it is not clear whether there is an adequate basis for judging security. Does post-quantum cryptography provide the functionality we expect from cryptography? For example, the original Diffie-Hellman system provides not just encryption but also more advanced features such as non-interactive key exchange (not provided by any NIST submissions) and blinding. The era of post-NIST post-quantum cryptography has begun with the exciting new CSIDH proposal, which has non-interactive key exchange and is smaller than any NIST submission, but uses more CPU time and needs much more study. Is post-quantum cryptography small enough? Even for network protocols that rely purely on encryption, integration remains a major problem because of the bandwidth requirements of most post-quantum systems, especially the post-quantum systems with the strongest security track records. Experiments with integration of post-quantum cryptography into TLS have focused on encryption without post-quantum authentication. A new generation of network protocols has been designed from the ground up for full post-quantum security. Is post-quantum cryptographic software fast enough, and is it safe to use? Adding post-quantum cryptography to the cryptographic software ecosystem has produced a giant step backwards in software quality. Major areas of current activity include software speedups, benchmarking, bug fixes, formal verification, patent avoidance, and development of post-quantum software libraries such as Open Quantum Safe and libpqcrypto. The talk will be given as a joint presentation by Daniel J. Bernstein and Tanja Lange. djb Tanja Lange https://fahrplan.events.ccc.de/congress/2018/Fahrplan/events/9926.html
Views: 516 media.ccc.de
The one-time pad | Journey into cryptography | Computer Science | Khan Academy
 
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The perfect cipher Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/frequency-stability?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/polyalphabetic-cipher?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: 424681 Khan Academy
Proofs Of Work - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 396 Udacity
TMPA-2013: Zakharov: Mathematical Aspects of Program Obfuscation
 
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Vladimir A. Zakharov, Associate Professor of Mathematical Cybernetics Department, Head of Laboratory of Mathematical Problems of Computer Security, Faculty of Computational Mathematics and Cybernetics, Moscow State University (MSU) Topic: Mathematical Aspects of Program Obfuscation Obfuscating a program means bringing it, keeping its functionality, to such a form where extracting certain useful information about the program's properties, becomes a challenging task The task of program obfuscation belongs to the area of programming research, computational complexity theory, and cryptography. The presentation will cover general approaches to solving the task of program obfuscation, mathematical models used to assess the tamper resistance of obfuscation, and the main results proving the possibility or impossibility of obfuscation in certain program classes.
Views: 212 Iosif Itkin
48 Dirty Little Secrets Cryptographers Don’t Want You To Know
 
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By Thomas Ptacek and Big Ol Al "Over the past year, more than 10,000 people participated in the Matasano crypto challenges, a staged learning exercise where participants implemented 48 different attacks against realistic cryptographic constructions. In the process, we collected crypto exploit code in dozens of different languages, ranging from X86 assembly to Haskell. With the permission of the participants, we've built a ""Rosetta Code"" site with per-language implementations of each of the crypto attacks we taught. In this talk, we'll run through all 48 of the crypto challenges, giving Black Hat attendees early access to all of the crypto challenges. We'll explain the importance of each of the attacks, putting them into the context of actual software flaws. Our challenges cover crypto concepts from block cipher mode selection to public key agreement algorithms. For some of the more interesting attacks, we'll step-by-step the audience through exploit code, in several languages simultaneously."
Views: 67161 Black Hat
Martijn Grooten - Elliptic Curve Cryptography for those who are afraid of maths
 
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Elliptic Curve Cryptography (ECC) is hot. Far better scalable than traditional encryption, more and more data and networks are being protected using ECC. Not many people know the gory details of ECC though, which given its increasing prevalence is a very bad thing. In this presentation I will turn all members of the audience into ECC experts who will be able to implement the relevant algorithms and also audit existing implementations to find weaknesses or backdoors. Actually, I won't. To fully understand ECC to a point where you could use it in practice, you would need to spend years inside university lecture rooms to study number theory, geometry and software engineering. And then you can probably still be fooled by a backdoored implementation. What I will do, however, is explain the basics of ECC. I'll skip over the gory maths (it will help if you can add up, but that's about the extent of it) and explain how this funny thing referred to as "point addition on curves" can be used to exchange a secret code between two entities over a public connection. I will also explain how the infamous backdoor in Dual_EC_DRGB (a random number generator that uses the same kind of maths) worked. At the end of the presentation, you'll still not be able to find such backdoors yourselves and you probably realise you never will. But you will be able to understand articles about ECC a little better. And, hopefully, you will be convinced it is important that we educate more people to become ECC-experts.
Views: 26331 Security BSides London
Cryptographic Key Management APIs - Graham Steel
 
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Most developers use cryptography via an application program interface (API) either to a software library or a hardware device where keys are stored and all cryptographic operations take place. Designing such interfaces so that they offer flexible functionality but cannot be abused to reveal keys or secrets has proved to be extremely difficult, with a number of published vulnerabilities in widely-used crypto APIs appearing over the last decade. This lecture will focus on the example of RSA PKCS#11, the most widely used interface for cryptographic devices, but will allow us to develop principles and concepts that apply to most crypto APIs. We will demonstrate a tool, Tookan, which can reverse engineer the particular configuration of PKCS#11 in use on some device under test, construct a model of the device's functionality, and call a model checker to search for attacks. If an attack is found, it can be executed automatically on the device. We will also look at attacks related to the implementation of cryptography. This lecture follows naturally from the general introduction to security APIs, but is independent in the sense that it is disjoint and self-contained. Learning objectives basic design of cryptographic APIs logical flaws in key management cryptographic flaws in implementations The lecture was delivered at SecAppDev 2013 in Leuven, Belgium, by Graham Steel. Graham Steel holds a masters in mathematics from the University of Cambridge and a PhD in informatics from the University of Edinburgh. He is currently a researcher at INRIA, the French national agency for computer science research, where he is part of the Prosecco project team based in central Paris. Steel's main research interests are in formal analysis of information security and applied cryptography. His current work on cryptographic API verification involves using formal techniques to construct and analyse abstract models of cryptographic device interfaces. In addition to international conference and journal publications, his recent results have featured in Wired magazine and the New York Times. He has taught courses on security APIs at Tsinghua University (Beijing) and the University of Venice (Italy) as well as organising a Dagstuhl seminar on the subject.
Views: 5813 secappdev.org
Quantum Cryptography Explained
 
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This episode is brought to you by Squarespace: http://www.squarespace.com/physicsgirl With recent high-profile security decryption cases, encryption is more important than ever. Much of your browser usage and your smartphone data is encrypted. But what does that process actually entail? And when computers get smarter and faster due to advances in quantum physics, how will encryption keep up? http://physicsgirl.org/ ‪http://twitter.com/thephysicsgirl ‪http://facebook.com/thephysicsgirl ‪http://instagram.com/thephysicsgirl http://physicsgirl.org/ Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Creator/Editor: Dianna Cowern Writer: Sophia Chen Animator: Kyle Norby Special thanks to Nathan Lysne Source: http://gva.noekeon.org/QCandSKD/QCand... http://physicsworld.com/cws/article/n... https://epic.org/crypto/export_contro... http://fas.org/irp/offdocs/eo_crypt_9... Music: APM and YouTube
Views: 279139 Physics Girl
Encrypt/Decrypt with RSA in C# (simplest method)
 
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Source Code Project http://microify.com/1Tgn blog melardev.x10host.com twitter http://twitter.com/melardev blogger https://melardev.blogspot.com instagram https://www.instagram.com/melar_dev/ Google+ https://plus.google.com/u/0/110174297675710954678
Views: 18635 Melardev
Bugs in Crypto Implementations
 
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Whether it’s by email, text, or social media platform, the average person will send over 60 messages per day—that's 22,000 messages per year. With billions of messages sent around the world each day, how can you be sure that your messages are safe and secure? Join professor Dan Boneh, one of the world’s leading experts of applied cryptography and network security, in this breakdown of vulnerabilities in WEP and iMessage. This presentation is brought to you by the Stanford Computer Forum and the Stanford Advanced Computer Security Program. If you would like information on how to join the forum and attend the next meeting, see our website: http://forum.stanford.edu/about/howtojoin.php.
Views: 1749 stanfordonline
Public Key Cryptography - Computerphile
 
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Spies used to meet in the park to exchange code words, now things have moved on - Robert Miles explains the principle of Public/Private Key Cryptography note1: Yes, it should have been 'Obi Wan' not 'Obi One' :) note2: The string of 'garbage' text in the two examples should have been different to illustrate more clearly that there are two different systems in use. http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels
Views: 441012 Computerphile
Public key cryptography - Diffie-Hellman Key Exchange (full version)
 
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The history behind public key cryptography & the Diffie-Hellman key exchange algorithm. We also have a video on RSA here: https://www.youtube.com/watch?v=wXB-V_Keiu8
Views: 640699 Art of the Problem
RSA encryption: Step 4 | Journey into cryptography | Computer Science | Khan Academy
 
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RSA worked example Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/checkpoint-advanced-lessons?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/euler-s-totient-function-phi-function?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: 96511 Khan Academy Labs
Cryptographic Algorithms and Secure Hardware
 
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Prof. François-Xavier Standaert summarizes the results of his ERC starting grant on cryptographic algorithms and secure hardware. More details on: http://perso.uclouvain.be/fstandae/erc.html Institute of Information and Communication Technologies, Electronics and Applied Mathematics (ICTEAM) http://www.uclouvain.be/en-icteam.html Ecole Polytechnique de Louvain (EPL) http://www.uclouvain.be/epl.html Universite catholique de Louvain (UCL) http://www.uclouvain.be
The Enigma encryption machine | Journey into cryptography | Computer Science | Khan Academy
 
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WW2 Encryption is explored with a focus on the Enigma. Read more here. Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/perfect-secrecy?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/frequency-stability?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: 190788 Khan Academy Labs