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Elliptic Curve Cryptography Tutorial - An Introduction to Elliptic Curve Cryptography
 
09:34
Learn more advanced front-end and full-stack development at: https://www.fullstackacademy.com Elliptic Curve Cryptography (ECC) is a type of public key cryptography that relies on the math of both elliptic curves as well as number theory. This technique can be used to create smaller, faster, and more efficient cryptographic keys. In this Elliptic Curve Cryptography tutorial, we introduce the mathematical structure behind this new algorithm. Watch this video to learn: - What Elliptic Curve Cryptography is - The advantages of Elliptic Curve Cryptography vs. old algorithms - An example of Elliptic Curve Cryptography
Views: 12253 Fullstack Academy
Blockchain tutorial 11: Elliptic Curve key pair generation
 
18:58
This is part 11 of the Blockchain tutorial explaining how the generate a public private key using Elliptic Curve. In this video series different topics will be explained which will help you to understand blockchain. Bitcoin released as open source software in 2009 is a cryptocurrency invented by Satoshi Nakamoto (unidentified person or group of persons). After the introduction of Bitcoin many Bitcoin alternatives were created. These alternate cryptocurrencies are called Altcoins (Litecoin, Dodgecoin etc). Bitcoin's underlying technology is called Blockchain. The Blockchain is a distributed decentralized incorruptible database (ledger) that records blocks of digital information. Each block contains a timestamp and a link to a previous block. Soon people realises that there many other use cases where the Blockchain technology can be applied and not just as a cryptocurrency application. New Blockchain platforms were created based on the Blockchain technology, one of which is called Ethereum. Ethereum focuses on running programming code, called smart contracts, on any decentralized application. Using the new Blockchain platforms, Blockchain technology can be used in supply chain management, healthcare, real estate, identity management, voting, internet of things, etcetera, just to name a few. Today there is a growing interest in Blockchain not only in the financial sector but also in other sectors. Explaining how Blockchain works is not easy and for many the Blockchain technology remains an elusive concept. This video series tries to explain Blockchain to a large audience but from the bottom up. Keywords often used in Blockchain conversation will be explained. Each Blockchain video is short and to the point. It is recommended to watch each video sequentially as I may refer to certain Blockchain topics explained earlier. Check out all my other Blockchain tutorial videos https://goo.gl/aMTFHU Subscribe to my YouTube channel https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: http://www.mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html The presentation used in this video tutorial can be found at: http://www.mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html The python script used in the video: https://www.mobilefish.com/download/cryptocurrency/bitcoin_ec_key_generation.py.txt Cryptocurrency address generator and validator: https://www.mobilefish.com/services/cryptocurrency/cryptocurrency.html Desmos graph: https://www.desmos.com/calculator/kkj2efqk5x James D'Angelo, Bitcoin 101 Elliptic Curve Cryptography Part 4: https://youtu.be/iB3HcPgm_FI #mobilefish #blockchain #bitcoin #cryptocurrency #ethereum
Views: 18497 Mobilefish.com
Breaking ECDSA (Elliptic Curve Cryptography) - rhme2 Secure Filesystem v1.92r1 (crypto 150)
 
08:19
We are going to recover a ECDSA private key from bad signatures. Same issue the Playstation 3 had that allowed it to be hacked. -=[ πŸ”΄ Stuff I use ]=- β†’ Microphone:* https://amzn.to/2LW6ldx β†’ Graphics tablet:* https://amzn.to/2C8djYj β†’ Camera#1 for streaming:* https://amzn.to/2SJ66VM β†’ Lens for streaming:* https://amzn.to/2CdG31I β†’ Connect Camera#1 to PC:* https://amzn.to/2VDRhWj β†’ Camera#2 for electronics:* https://amzn.to/2LWxehv β†’ Lens for macro shots:* https://amzn.to/2C5tXrw β†’ Keyboard:* https://amzn.to/2LZgCFD β†’ Headphones:* https://amzn.to/2M2KhxW -=[ ❀️ Support ]=- β†’ per Video: https://www.patreon.com/join/liveoverflow β†’ per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ πŸ• Social ]=- β†’ Twitter: https://twitter.com/LiveOverflow/ β†’ Website: https://liveoverflow.com/ β†’ Subreddit: https://www.reddit.com/r/LiveOverflow/ β†’ Facebook: https://www.facebook.com/LiveOverflow/ -=[ πŸ“„ P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm. #CTF #Cryptography
Views: 31894 LiveOverflow
Cryptography in JavaScript
 
25:09
Speaker: Demian Kostelny, Software Developer. The talk was presented at the Dynamic Talks #4 in Lviv.
Views: 179 Grid Dynamics
Cryptography for JavaScript Developers - Nakov @ JS.Talks() 2018
 
01:12:44
Title: Cryptography for JavaScript Developers Speaker: Svetlin Nakov, PhD Conference: js.talks() 2018 Most developers believe they know cryptography, just because they store their passwords hashed instead of in plaintext and because have once configured SSL. In this talk the speaker fills the gaps by explaining some cryptographic concepts with examples in JavaScript. The talk covers: - Hashes, HMAC and key derivation functions (Scrypt, Argon2) with examples in JavaScript - Encrypting passwords: from plain text to Argon2 - Symmetric encryption at the client-side: AES, block modes, CTR mode, KDF, HMAC, examples in JavaScript - Digital signatures, ECC, ECDSA, EdDSA, signing messages, verifying signatures, examples in JavaScript - Why client-side JavaScript cryptography might not be safe? Man-in-the-browser attacks, Cross-Site Scripting (XSS) / JavaScript injection, etc. More info, slides and video: http://www.nakov.com/blog/2018/11/18/cryptography-for-javascript-developers-nakov-js-talks-2018/
Views: 484 Svetlin Nakov
Web Crypto API ECDH generateKey deriveBits perform AES encryption and decryption
 
00:39
Reference https://8gwifi.org/docs/window-crypto-ecdh.jsp The Web crypto api describes using Elliptic Curve Diffie-Hellman (ECDH) for key generation and key agreement, as specified by RFC6090. This is the web cryptography api example of performing ECDH generateKey and derivebits, and then using generate key to encrypt and decrypt the message in AES web crypto api example web crypto api example ecdh javascript web crypto api example ecdh
Views: 90 Zariga Tongy
RustConf 2017 - Fast, Safe, Pure-Rust Elliptic Curve Cryptography
 
34:22
Fast, Safe, Pure-Rust Elliptic Curve Cryptography by Isis Lovecruft & Henry De Valence This talk discusses the design and implementation of curve25519-dalek, a pure-Rust implementation of operations on the elliptic curve known as Curve25519. We will discuss the goals of the library and give a brief overview of the implementation strategy. We will also discuss features of the Rust language that allow us to achieve competitive performance without sacrificing safety or readability, and future features that could allow us to achieve more safety and more performance. Finally, we will discuss how -dalek makes it easy to implement complex cryptographic primitives, such as zero-knowledge proofs.
Views: 587 Confreaks
Reverse engineering obfuscated JavaScript - PopUnder Chrome 59
 
14:04
In this video we figure out how to do a popunder in Chrome version 59, by using a trick. Hopefully Chrome fixes this, because I resent this kind of advertisement. PoC: https://liveoverflow.com/poc/popunder.html -=[ πŸ”΄ Stuff I use ]=- β†’ Microphone:* https://amzn.to/2LW6ldx β†’ Graphics tablet:* https://amzn.to/2C8djYj β†’ Camera#1 for streaming:* https://amzn.to/2SJ66VM β†’ Lens for streaming:* https://amzn.to/2CdG31I β†’ Connect Camera#1 to PC:* https://amzn.to/2VDRhWj β†’ Camera#2 for electronics:* https://amzn.to/2LWxehv β†’ Lens for macro shots:* https://amzn.to/2C5tXrw β†’ Keyboard:* https://amzn.to/2LZgCFD β†’ Headphones:* https://amzn.to/2M2KhxW -=[ ❀️ Support ]=- β†’ per Video: https://www.patreon.com/join/liveoverflow β†’ per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ πŸ• Social ]=- β†’ Twitter: https://twitter.com/LiveOverflow/ β†’ Website: https://liveoverflow.com/ β†’ Subreddit: https://www.reddit.com/r/LiveOverflow/ β†’ Facebook: https://www.facebook.com/LiveOverflow/ -=[ πŸ“„ P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm. #ReverseEngineering
Views: 69269 LiveOverflow
Cryptography for Java Developers: Nakov jProfessionals (Jan 2019)
 
01:05:06
Cryptography for Java Developers Hashes, MAC, Key Derivation, Encrypting Passwords, Symmetric Ciphers & AES, Digital Signatures & ECDSA About the Speaker What is Cryptography? Cryptography in Java – APIs and Libraries Hashes, MAC Codes and Key Derivation (KDF) Encrypting Passwords: from Plaintext to Argon2 Symmetric Encryption: AES (KDF + Block Modes + IV + MAC) Digital Signatures, Elliptic Curves, ECDSA, EdDSA Live demos and code examples: https://github.com/nakov/Java-Cryptography-Examples Slides: https://www.slideshare.net/nakov/cryptography-for-java-developers-nakov-jprofessionals-jan-2019 Blog: https://nakov.com/blog/2019/01/26/cryptography-for-java-developers-nakov-at-jprofessionals-jan-2019/
Views: 301 Svetlin Nakov
10 Weird Applications of Public Key Cryptography - Tim Caswell
 
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Have you ever wondered about RSA keypairs, web certificates, JSON Web Tokens? How about those new-fangled Ed25519 keys ? This talk will visually explain the core concepts behind all this tech and then gives 10 concrete use cases for using it in JavaScript servers and applications. www.utahjs.com 2017 UtahJS Conference Monday, September 18, 2017 Jordan Commons Event Center
Views: 231 UtahJS
web crypto api  ecdsa generate key sign verify message
 
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Reference : https://8gwifi.org/docs/window-crypto-ecdsa.jsp The Web crypto api ECDSA algorithm identifier is used to perform signing and verification using the ECDSA algorithm specified in RFC6090 and using the SHA hash functions and elliptic curves defined in this specification. web crypto api example javascript web crypto api example web crypto api digital signature html5 web cryptography api
Views: 88 Zariga Tongy
Bitcoin ECDSA- Elliptic curve Digital Signature
 
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This video explains through flowcharts the elliptic curve digital signature algorithms: signing and verifying functions.
Views: 2466 Dr Abdel lam
How to generate JavaScript random numbers
 
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Generating random numbers is a common thing in programming. Here in this video you will see some examples of how to generate random numbers with JavaScript. Take a look at my post here: https://zk.ciihuy.com/javascript-random-numbers-examples/
Views: 38 ThirteeNov
Developer Seminar at NYC Blockchain Center - Applied Rust for Protocol Development
 
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Ling Qing Meng delivers a keynote at the first educational seminar at the New York City Blockchain Center. https://decentral.partners 00:01 - Introduction and Background Sharing 01:50 - Explanation of Rust 07:08 - Demo of Elliptic Curve Cryptography in Rust and Module Creation 24:01 - What is WebAssembly? (WASM) 27:55 - WASM Use Cases 36:50 - Introduction to Substrate Addressing current issues with programming languages and looking to the future of newer languages, Ling demonstrates the capability of Rust. Showcasing faster processing times, higher reliability, and all new features via a live interactive demo. Be sure to catch the Decentral team in the near future at one of several events. Schedule on our site: https://decentral.partners --- At Decentral, we offer a variety of services such as (but not limited to) ZK services, a protocol audit, Tron blockchain development services, EOS development services, IOT services, etc. Partnered with Nagu Thogiti, we also hold access to one of the strongest smart contract auditors in the industry. We work with some of the most advanced blockchain protocols, auditing tech and working to improve upon the existing products. If your blockchain protocol implements new or advanced designs, we are actively looking to discuss new partnerships and strategic relations. Our expertise ensures successful, easy, fast, secure, and cost-effective delivery of services. Inquire Further Here: http://bit.ly/decentralinquiries
Views: 162 Ling Qing Meng
SF Bitcoin Devs Seminar: SPV Nodes in JavaScript with Ryan Charles
 
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Ryan X. Charles presents his work from BitPay and Reddit on bitcoin including bitcore and fullnode. He also reveals his story of what happened while working at Reddit and how his crypto-project rolled out there.
Zero Knowledge Proof
 
10:18
Protecting your online privacy could become a lot easier with Zero Knowledge Proof. A technique that allows you to prove things without disclosing what it is you're proving. Need to have a certain age before you can signup for a service? You can deliver a proof that you meet the criteria without sharing your actual age. Or you could prove to your bank that your salary is sufficient to get a loan, without revealing your real salary. πŸ“š Sources https://savjee.be/videos/simply-explained/zero-knowledge-proof/ 🌍 Social Twitter: https://twitter.com/savjee Facebook: https://www.facebook.com/savjee ✏️ Check out my blog https://www.savjee.be
Bitcoin 101 - Elliptic Curve Cryptography - Part 4 - Generating the Public Key (in Python)
 
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Welcome to part four in our series on Elliptic Curve Cryptography. I this episode we dive into the development of the public key. In just 44 lines of code, with no special functions or imports, we produce the elliptic curve public key for use in Bitcoin. Better still, we walk you through it line by line, constant by constant. Nothing makes the process clearer and easier to understand than seeing it in straight forward code. If you've been wondering about the secp256k1 (arguably the most important piece of code in Bitcoin), well then this is the video for you. This is part 4 of our upcoming series on Elliptic Curves. Because of such strong requests, even though this is part 4, it is the first one we are releasing. In the next few weeks we will release the rest of the series. Enjoy. Here's the link to our Python code (Python 2.7.6): https://github.com/wobine/blackboard101/blob/master/EllipticCurvesPart4-PrivateKeyToPublicKey.py Here's the private key and the link to the public address that we use. Do you know why it is famous? Private Key : A0DC65FFCA799873CBEA0AC274015B9526505DAAAED385155425F7337704883E Public Address on Blockchain.info https://blockchain.info/address/1JryTePceSiWVpoNBU8SbwiT7J4ghzijzW Here's the private key we use at the end: 42F615A574E9CEB29E1D5BD0FDE55553775A6AF0663D569D0A2E45902E4339DB Public Address on Blockchain.info https://blockchain.info/address/16iTdS1yJhQ6NNQRJqsW9BF5UfgWwUsbF Welcome to WBN's Bitcoin 101 Blackboard Series -- a full beginner to expert course in bitcoin. Please like, subscribe, comment or even drop a little jangly in our bitcoin tip jar 1javsf8GNsudLaDue3dXkKzjtGM8NagQe. Thanks, WBN
Views: 22201 CRI
Calculus: Graphing the Elliptic Curve
 
02:31
http://www.mindbites.com/lesson/3539 for full video. Check out http://www.mindbites.com/series/227-calculus for a comprehensive video-based calculus course or http://www.mindbites.com/category/23-calculus for additional individual video lessons on specific Calculus concepts and topics of study.
Views: 689 Mindbitesdotcom
RSA Key Generation, Signatures and Encryption using OpenSSL
 
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Demonstration of using OpenSSL to create RSA public/private key pair, sign and encrypt messages using those keys and then decrypt and verify the received messages. Commands used: openssl. Created by Steven Gordon on 7 March 2012 at Sirindhorn International Institute of Technology, Thammasat University, Thailand.
Views: 65389 Steven Gordon
Using z3 to find a password and reverse obfuscated JavaScript - Fsec2017 CTF
 
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Recently I attended fsec 2017 in croatia. And there was a cool CTF challenge I solved during the conference that I wanted to share. script: https://gist.github.com/LiveOverflow/11bde6352f52be33864f1fd657e7cde1 -=[ πŸ”΄ Stuff I use ]=- β†’ Microphone:* https://amzn.to/2LW6ldx β†’ Graphics tablet:* https://amzn.to/2C8djYj β†’ Camera#1 for streaming:* https://amzn.to/2SJ66VM β†’ Lens for streaming:* https://amzn.to/2CdG31I β†’ Connect Camera#1 to PC:* https://amzn.to/2VDRhWj β†’ Camera#2 for electronics:* https://amzn.to/2LWxehv β†’ Lens for macro shots:* https://amzn.to/2C5tXrw β†’ Keyboard:* https://amzn.to/2LZgCFD β†’ Headphones:* https://amzn.to/2M2KhxW -=[ ❀️ Support ]=- β†’ per Video: https://www.patreon.com/join/liveoverflow β†’ per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ πŸ• Social ]=- β†’ Twitter: https://twitter.com/LiveOverflow/ β†’ Website: https://liveoverflow.com/ β†’ Subreddit: https://www.reddit.com/r/LiveOverflow/ β†’ Facebook: https://www.facebook.com/LiveOverflow/ -=[ πŸ“„ P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm. #CTF
Views: 36754 LiveOverflow
Ashley Williams - How I Convinced the World's Largest Package Manager to Use Rust, and So Can You!
 
37:34
I made one of my favorite pull requests ever on December 17, 2016: rust-www/pulls/634: add npm to friends page On any given day, the npm registry, a repository of packages primarily for JavaScript and Node.js, serves around 350,000,000 package downloads. The npm services team is small and this once little Node.js service, the lifeblood of the modern web development workflow, is now a huge set of microservices- and starting in late 2016, it’s no longer just Node.js- it’s running production Rust. In this talk, I’ll tell the story of how I convinced my manager and team to give Rust a chance. Along the way, I’ll talk about the critical challenges that the npm registry services encounter on a daily basis, the patterns we’ve adopted to cope with the heavy operational load, and how they are well suited to be solved with Rust. I’ll also highlight the unique aspects of Rust that make it an pleasure to learn and teach, as well as how it is a strong technical candidate for replacing Node.js (hint: Tokio!). At the end of the talk, you will have a keen understanding of what problems Rust is good at solving and feel motivated and empowered to start the conversation about bringing Rust into your own organization. Ashley Williams https://twitter.com/ag_dubs https://github.com/ashleygwilliams https://users.rust-lang.org/users/ag_dubs/activity
Views: 26369 Rust
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: 87294 sentdex
Introduction to Bitcoin with Yours Bitcoin, Lecture 3: Elliptic Curves
 
39:27
A course on how bitcoin works and how to program bitcoin stuff with the javascript bitcoin library Yours Bitcoin. Taught by Ryan X. Charles, Cofounder & CEO of Yours, and former cryptocurrency engineer of reddit. The third lecture covers elliptic curves and in particular secp256k1, the curve used by bitcoin. This curve is used for public keys and ECDSA, the digital signature algorithm of bitcoin. https://github.com/yoursnetwork/yours-bitcoin https://github.com/yoursnetwork/yours-bitcoin-examples https://www.yours.network https://www.ryanxcharles.com/ https://twitter.com/ryanxcharles
Views: 781 Yours
Blockchain tutorial 4: Cryptography, encrypt, decrypt
 
02:08
This is part 4 of the Blockchain tutorial explaining what cryptograhy is and also what encrypt and decrypt means. In this video series different topics will be explained which will help you to understand blockchain. Bitcoin released as open source software in 2009 is a cryptocurrency invented by Satoshi Nakamoto (unidentified person or group of persons). After the introduction of Bitcoin many Bitcoin alternatives were created. These alternate cryptocurrencies are called Altcoins (Litecoin, Dodgecoin etc). Bitcoin's underlying technology is called Blockchain. The Blockchain is a distributed decentralized incorruptible database (ledger) that records blocks of digital information. Each block contains a timestamp and a link to a previous block. Soon people realises that there many other use cases where the Blockchain technology can be applied and not just as a cryptocurrency application. New Blockchain platforms were created based on the Blockchain technology, one of which is called Ethereum. Ethereum focuses on running programming code, called smart contracts, on any decentralized application. Using the new Blockchain platforms, Blockchain technology can be used in supply chain management, healthcare, real estate, identity management, voting, internet of things, etcetera, just to name a few. Today there is a growing interest in Blockchain not only in the financial sector but also in other sectors. Explaining how Blockchain works is not easy and for many the Blockchain technology remains an elusive concept. This video series tries to explain Blockchain to a large audience but from the bottom up. Keywords often used in Blockchain conversation will be explained. Each Blockchain video is short and to the point. It is recommended to watch each video sequentially as I may refer to certain Blockchain topics explained earlier. Check out all my other Blockchain tutorial videos https://goo.gl/aMTFHU Subscribe to my YouTube channel https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: http://www.mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html #mobilefish #blockchain #bitcoin #cryptocurrency #ethereum
Views: 40560 Mobilefish.com
Introduction to Bitcoin with Yours Bitcoin, Lecture 5: ECDSA
 
24:24
A course on how bitcoin works and how to program bitcoin stuff with the javascript bitcoin library Yours Bitcoin. Taught by Ryan X. Charles, Cofounder & CEO of Yours, and former cryptocurrency engineer of reddit. The fourth lecture covers ECDSA, or Elliptic Curve Digital Signature Algorithm, the digital signature algorithm used by bitcoin. https://github.com/yoursnetwork/yours-bitcoin https://github.com/yoursnetwork/yours-bitcoin-examples https://www.yours.network https://www.ryanxcharles.com/ https://twitter.com/ryanxcharles
Views: 1036 Yours
Asymmetric encryption - Simply explained
 
04:40
How does public-key cryptography work? What is a private key and a public key? Why is asymmetric encryption different from symmetric encryption? I'll explain all of these in plain English! 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be πŸ‘πŸ» Like my Facebook page: https://www.facebook.com/savjee
Introduction to Bitcoin with Yours Bitcoin, Lecture 2: Private Keys and Public Keys
 
34:13
A course on how bitcoin works and how to program bitcoin stuff with the javascript bitcoin library Yours Bitcoin. Taught by Ryan X. Charles, Cofounder & CEO of Yours, and former cryptocurrency engineer of reddit. The second lecture gives a first-pass introduction to private keys and public keys. Because a complete understanding of private keys and public keys requires understanding elliptic curves and hash functions, we will revisit them again later after covering elliptic curves and hash functions. https://github.com/yoursnetwork/yours-bitcoin-examples https://github.com/yoursnetwork/yours-bitcoin https://www.yours.network https://www.ryanxcharles.com/ https://twitter.com/ryanxcharles
Views: 926 Yours
Martijn Grooten  -- Getting ahead of the elliptic curve
 
45:31
Elliptic curves are relatively obscure mathematical objects: you can get a PhD in maths without ever having come across them. Yet these objects play an important role in modern cryptography and as such are found in most HTTPS connections, in Bitcoin, and in a large number of other places. To really understand elliptic curve cryptography (ECC) to the point that you can implement algorithms, you'd have to study the maths behind it. This talk assumes that you haven't studied the maths, but just want to understand what ECC is about, how is works and how it is implemented. It will discuss how 'point addition' works and how the Elliptic Curve Diffie-Hellman algorithm is used, for example in HTTPS - and how you can find it using Wireshark. It will explain how to use elliptic curve for digital signatures and why you don't want to be like Sony when it comes to implementing them. It will discuss how ECC was used in an infamous random number generator and, finally, will take a brief look at the use of elliptic curves in post-quantum algorithms. The goal of this talk is to keep things simple and understandable and no knowledge of maths is assumed. The talk won't make you an expert on ECC -- that would take years of studying. But it might help you understand the context a bit better when you come across them in your research. And hopefully it will also be a little bit fun. -- Martijn Grooten is a lapsed mathematician who by chance ended up working in security - and loved it. He's spend more than a decade testing security software but his interest in security is broad and he has a weak spot for cryptography. He currently is Editor of Virus Bulletin.
Views: 89 NorthSec
Implementation of Homomorphic Encryption: Paillier
 
11:27
https://asecuritysite.com/encryption/pal_ex
Views: 2887 Bill Buchanan OBE
ShmooCon 2017: SafeCurves: Choosing Safe Curves for Elliptic Curve Cryptography
 
01:10:30
For more information visit: To download the video visit: Playlist Shmoocon 2017: Speakers: Daniel J. Bernstein. This video is an explanation following the paper Dual EC: A Standardized Backdoor by Daniel J. Bernstein, Tanja Lange and Ruben Niederhagen I have a blog here: And you. Slides - - Paper - Keywords: Elliptic-curve cryptography, verifiably.
Views: 36 Belle Crossett
Instant Messaging and the Signal Protocol - Computerphile
 
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How do instant message apps do end to end encryption when one phone may not even be switched on yet? Dr Mike Pound on the Signal protocol at the core of most messaging apps. Double Ratchet: COMING SOON! https://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: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 136816 Computerphile
CascadiaJS 2013 - Matt Bergman - JS Bringing Crypto to the Masses
 
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www.cascadiajs.com November 14 -- 15, 2013 Vancouver, BC, Canada CascadiaJS is a two-day conference on the cutting edge of JavaScript. Browser, server, OS -- we cover it all.
Views: 617 Cascadia JS
AppSec EU 2017 On The (In-)Security Of JavaScript Object Signing And Encryption by Dennis Detering
 
44:50
JavaScript Object Signing and Encryption (JOSE) has been standardized as a lightweight alternative to XML Signature and Encryption. It has early been integrated in authentication and authorization protocols like OpenID Connect and OAuth. In addition, it has been adopted in Web services. In our research, we provide the first study regarding the JSON security adapting and extending known attack techniques. We provide an evaluation of four different libraries revealing critical cryptographic attacks, ranging from attacks bypassing JSON Signature (Signature exclusion, Key Confusion, and Timing Attack on HMAC), to JSON Encryption (Bleichenbacher Million Message Attack). To facilitate the analysis we developed JOSEPH - the first open-source automated tool for evaluating JSON security. The extensible design of JOSEPH allows one to implement further cryptographic attacks, for example, padding oracle or invalid curve attacks. - Managed by the official OWASP Media Project https://www.owasp.org/index.php/OWASP_Media_Project
Views: 2115 OWASP
Cookie Stealing - Computerphile
 
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Cookie Monster isn't the only one fond of cookies - thieves on the Internet are partial too. Dr Mike Pound demonstrates & explains the art of cookie stealing. Follow the Cookie Trail: https://youtu.be/LHSSY8QNvew Cracking Websites with Cross Site Scripting: https://youtu.be/L5l9lSnNMxg Space Carving: https://youtu.be/cGs90KF4oTc Deep Learning: https://youtu.be/l42lr8AlrHk Secure Web Browsing: https://www.youtube.com/watch?v=E_wX40fQwEA Anti Counterfeiting & Conductive Inks: https://youtu.be/gQ0rdOvdS6M Object Oriented Programming: https://youtu.be/KyTUN6_Z9TM Security of Data on Disk: https://youtu.be/4SSSMi4X_mA 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. More at http://www.bradyharan.com
Views: 580824 Computerphile
Public Key Cryptography: Diffie-Hellman Key Exchange (short version)
 
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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: 450670 Art of the Problem
Diffie Hellman Key Exchange Algorithm | Complete Working with Diagram & Example
 
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In this video tutorial we will study and understand the working of Diffie-Hellman Key exchange algorithm. Symmetric Key Echange Problem - 1. Key exchange solution is not fool proof or is not practically possible. 2. This problem is called as key distribution or key exchange problem. 3. It is inherently linked with the symmetric key cryptography Diffie-Hellman Key Exchange/ Agreement Algorithm - 1. Two parties, can agree on a symmetric key using this technique. 2. This can then be used for encryption/ decryption. 3. This algorithm can be used only for key agreement, but not for encryption or decryption. 4. It is based on mathematical principles Diffie Hellman Algorithm Steps - 1. Firstly Alice and Bob mutually agree on 2 large prime numbers, n & g. These 2 numbers need not be kept secret. 2. Alice chooses another large random number x(private to her) and calculates A such that A = g^x mod n. 3. Alice sends this number A to Bob. 4. Bob independently chooses another large random number y(private to him) and calculates B such that B = g^y mod n. 5. Bob sends this number B to Alice. 6. Alice now computes her private key value K1 as: K1 = B^x mod n. 7. Bob computes his private key value K2 as: K2 = A^y mod n. 8. K1 == K2 (key exchange done successfully) Complete Network Security / Information Security Playlist - https://www.youtube.com/watch?v=IkfggBVUJxY&list=PLIY8eNdw5tW_7-QrsY_n9nC0Xfhs1tLEK Download my FREE Network Security Android App - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets Official Website - http://simplesnippets.tech/ Simple Snippets on Facebook - https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram - https://www.instagram.com/simplesnippets/ Simple Snippets on Twitter - https://twitter.com/simplesnippet Simple Snippets Google Plus Page - https://plus.google.com/+SimpleSnippets Simple Snippets email ID - [email protected] For More Technology News, Latest Updates and Blog articles visit our Official Website - http://simplesnippets.tech/
Views: 2555 Simple Snippets
How Does SHA-1 Work - Intro to Cryptographic Hash Functions and SHA-1
 
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Learn more advanced front-end and full-stack development at: https://www.fullstackacademy.com SHA-1 stands for Secure Hash Algorithm 1, a cryptographic hash function developed by the NSA that can be used to verify that a file has been unaltered. In this video, we go over the basic features and common implementations of cryptographic hash functions before diving into the inner workings of a Javascript implementation of the SHA-1 function. Although out of use now, walking through the hash function code provides valuable insight into how these algorithms work. Watch this video to learn: - What are Cryptographic Hash Functions - Practical uses for Cryptographic Hash Functions - How does SHA-1 work
Views: 13231 Fullstack Academy
Chrome vs. Firefox - Stanford Javascript Crypto Library
 
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http://bitwiseshiftleft.github.com/sjcl/
Views: 812 brinchjdk
dotJS 2016 - Fedor Indutny - Memory Layout of V8's Heap
 
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Filmed at http://2016.dotjs.io on December 5th in Paris. More talks on https://www.dotconferences.com/talks How are high-level JS objects represented in memory? What makes object access fast in V8? Fedor dives into the mechanisms and tricks behind the memory heap implementation in Google's V8 JavaScript engine, and introduces llnode.
Views: 363 dotconferences
Node.js The Complete Guide to Build RESTful APIs (2018)
 
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https://www.tokopedia.com/digitalblast/node-js-the-complete-guide-to-build-restful-apis-2018
Views: 30 digital blast
Google CTF: Beginner Quest: OCR IS COOL! (Simple Cryptography)
 
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Join the Family: https://discord.gg/Kgtnfw4 Support me on Patreon: https://patreon.com/johnhammond010 Learn to code with a TeamTreehouse Discount: treehouse.7eer.net/1WOz6 E-mail: [email protected] PayPal: http://paypal.me/johnhammond010 GitHub: https://github.com/JohnHammond Site: http://www.johnhammond.org Twitter: https://twitter.com/_johnhammond
Views: 16281 John Hammond
Understanding the execution flow of the binary - White Box Unboxing 1/4 - RHme3 Qualifier
 
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We start to reverse engineer a crypto binary with Hopper. Challenge: https://github.com/Riscure/Rhme-2017/tree/master/prequalifications/White%20Box%20Unboxing -=[ πŸ”΄ Stuff I use ]=- β†’ Microphone:* https://amzn.to/2LW6ldx β†’ Graphics tablet:* https://amzn.to/2C8djYj β†’ Camera#1 for streaming:* https://amzn.to/2SJ66VM β†’ Lens for streaming:* https://amzn.to/2CdG31I β†’ Connect Camera#1 to PC:* https://amzn.to/2VDRhWj β†’ Camera#2 for electronics:* https://amzn.to/2LWxehv β†’ Lens for macro shots:* https://amzn.to/2C5tXrw β†’ Keyboard:* https://amzn.to/2LZgCFD β†’ Headphones:* https://amzn.to/2M2KhxW -=[ ❀️ Support ]=- β†’ per Video: https://www.patreon.com/join/liveoverflow β†’ per Month: https://www.youtube.com/channel/UClcE-kVhqyiHCcjYwcpfj9w/join -=[ πŸ• Social ]=- β†’ Twitter: https://twitter.com/LiveOverflow/ β†’ Website: https://liveoverflow.com/ β†’ Subreddit: https://www.reddit.com/r/LiveOverflow/ β†’ Facebook: https://www.facebook.com/LiveOverflow/ -=[ πŸ“„ P.S. ]=- All links with "*" are affiliate links. LiveOverflow / Security Flag GmbH is part of the Amazon Affiliate Partner Programm.
Views: 11512 LiveOverflow
Basic web cryptography
 
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Using an elliptic Curve to sign a very basic document https://gist.github.com/marcus7777/384ad914708922f44d519b00308088c3
Views: 84 Marcus Hitchins
IOTA tutorial 6: Why you should not reuse an address for outgoing transactions
 
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If you like this video and want to support me, go this page for my donation crypto addresses: https://www.youtube.com/c/mobilefish/about This is part 6 of the IOTA tutorial. In this video series different topics will be explained which will help you to understand IOTA. It is recommended to watch each video sequentially as I may refer to certain IOTA topics explained earlier. Digital signatures are used for authentication, integrity checking and non-repudiation.Β  Development of quantum computers threatens the security of currently used digital signature algorithms such as Rivest–Shamir–Adleman (RSA) and Elliptic Curve Digital Signature Algorithm (ECDSA). Cryptographers developed aΒ variety of quantum-resistant alternatives of which hash based signatures are the most promising. Hash based signatures are based on so called One Time Signatures (OTS). The term implies that a single public/private key pair must only be used once. Otherwise, an attacker is able to reveal more parts of the private key and spoof signatures. In 1979 Leslie Lamport created a method to construct digital signatures using only cryptographically secure one way hash functions. This method is called the Lamport signature or Lamport One Time Signature (OTS) scheme. Other One Time Signature schemes are the Merkle OTS and Winternitz OTS. The Lamport One Time Signature scheme is very easy to understand and is VERY LOOSELY comparable to Winternitz OTS. For simplicity's sake I will be using the Lamport One Time Signature scheme explaining why you should never reuse an IOTA address for outgoing transactions. Alice uses a random number generator and produces two pairs of 256 random numbers, total 512 numbers. Each random number is 256 bits in size. These random numbers forms the private key. Each of the 512 random numbers are separately hashed, using for example SHA-256. These hashed random numbers forms the public key. Alice has a document (or transaction data) which is hashed using SHA-256. The document hash is of course 256 bits long: 101..011 Alice wants to create a digital signature for her document. She applies the following procedure: - Loop thru each bit (n) of the hash from 0-255. - If the bit is a 0, publish the nth number from pair 0. - If the bit is a 1, publish the nth number from pair 1. - When all bits are looped, destroy all unused numbers from pair 0 and 1. This produces a sequence of 256 random numbers. The digital signature is a sequence of 256 random numbers. After the digital signature is created, delete all unused numbers from the private key. The digital signature consist half of the private key, the other 256 random numbersΒ are still unknown and thus nobody can create signatures that fit other message hashes. Alice sends her document, together with the corresponding digital signature and public key to Bob. Bob wants to verify Alice's document signature. He first hashes the document using SHA-256. The document hash is again: 101..011 Bob follows the same steps when Alice created the digital signature, but instead uses the public key. Bob produces a sequence of 256 hashes picked from Alice's public key. Bob now hashes each of the random number in the digital signature. If both sequence of hash numbers match then the signature is ok. The Lamport signature creates a digital signature which reveals part of the private key. The private key has 512 numbers and using it once will reveal 256 numbers. Using the private key twice weakens the security of the scheme again by half. The probability of an attacker being able to successfully forge a signature for a given message increases from 1/(2^256) to 1/(2^128). A third signature using the same key would increase the probability of a successful forgery to 1/(2^64) and a fourth signature to 1/(2^32), and so on. Please note IOTA's signature scheme is based on the Winternitz One Time Signature (WOTS) scheme and is NOT the same as the Lamport signature scheme. However by using the Lamport One Time Signature scheme I am trying to give you a very simplistic understanding why you should never reuse an IOTA address for outgoing transactions. Check out all my other IOTA tutorial videos: https://goo.gl/aNHf1y Subscribe to my YouTube channel: https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: https://www.mobilefish.com/developer/iota/iota_quickguide_tutorial.html #mobilefish #howto #iota
Views: 5742 Mobilefish.com
Applied Cryptography: The Digital Signature Algorithm - Part 4
 
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This video describes the signature verification process. It also provides a pseudo-algorithm to produce the primes "p" and "q" for the DSA public parameters. DSA public and private key in Java: https://youtu.be/l-d-V7RYXSE
Views: 1129 Leandro Junes
Diffie Hellman
 
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Views: 5032 Telusko
JSP- II
 
31:42
Subject:Computer Science Paper: Web technology
Views: 42 Vidya-mitra

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