Search results “Javascript crypto library public key cryptography”
Python Encryption Tutorial with PyCrypto
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: 80720 sentdex
Nadim Kobeissi HOPE 9  Why Browser Cryptography Is Bad & How We Can Make It Great
Nadim Kobeissi Web apps are becoming almost exponentially responsible for handling user data. This incredible increase summons an urgent requirement for client-side web browser crypto standards. However, web browsers lack client-side crypto standards for building blocks such as secure block ciphers, public key schemes, and hashing algorithms. Developers currently rely on JavaScript crypto libraries in order to implement these functions, which can, admittedly, provide strong crypto in some situations, but still falter when faced with certain attacks. This talk will look at Cryptocat, a security-centric web-chat client with client-side cryptography, and also focus on the problems, the solutions, and the limitations of JavaScript cryptography. There will be a discussion of potential solutions to these problems, which may very well require the implementation of an integrated universal web browser standard for client-side cryptography. crypto cat: https://crypto.cat
Views: 718 TheEthanwashere
JWT using RSA Public/Private Key Pairs
A little NodeJS demo of making and verifing JavaScript Web Tokens (JWT) using RSA Public/Private Key Pairs Table of Contents: 00:00 - Introduction 00:44 - 1. Get a RSA public/private PEM pair 01:41 - NPM Package for JWT 02:05 - Why this demo? 02:21 - Node - Read Keys off Disk 02:51 - Node - Specify the right algorithm 04:34 - Node - suggested option elements 04:41 - Issuer 04:48 - Subject 04:54 - Audiance 05:04 - Expires 05:40 - Signing Options 05:54 - Sign your payload with options 06:11 - Verify Options 06:37 - Node - Verify Token 06:53 - Node - Decode 07:02 - Demo 08:04 - Marker 22
Views: 7164 Stuart Williams
Chrome vs. Firefox - Stanford Javascript Crypto Library
Views: 788 brinchjdk
RSA Digital Signature: SIGN in Python pyCrypto & verify in JavaScript jsrsasign
In most cases, we want to interact our python server (Flask/Django) with multiple clients over the web that uses JavaScript. This is a demonstration of how can you generate a signature in python and verity that signature in JavaScript and Vice Versa. jsrsasign library test console: https://kjur.github.io/jsrsasign/sample/sample-rsasign.html
Views: 2529 Anum Sheraz
Enrico Zimuel - The Sodium crypto library of PHP 7.2 - phpday 2018
The Sodium crypto library (libsodium) is a modern, easy-to-use software library for encryption, decryption, signatures, password hashing and more. Sodium has been added to PHP 7.2 as core extension. In this talk we will show how to use Sodium in PHP projects to solve common problems, like how to store the users’ password, how to encrypt/decrypt sensitive information, how to authenticate user’s data, etc. We’ll also present some of the advanced features of libsodium like authenticated encryption, anonymous public-key encryption, and elliptic curve cryptography.
Views: 192 GrUSP
Java prog#129. How to encrypt and decrypt data in Java Part 1
------------------Online Courses to learn---------------------------- Java - https://bit.ly/2H6wqXk C++ - https://bit.ly/2q8VWl1 AngularJS - https://bit.ly/2qebsLu Python - https://bit.ly/2Eq0VSt C- https://bit.ly/2HfZ6L8 Android - https://bit.ly/2qaRSAS Linux - https://bit.ly/2IwOuqz AWS Certified Solutions Architect - https://bit.ly/2JrGoAF Modern React with Redux - https://bit.ly/2H6wDtA MySQL - https://bit.ly/2qcF63Z ----------------------Follow--------------------------------------------- My Website - http://www.codebind.com My Blog - https://goo.gl/Nd2pFn My Facebook Page - https://goo.gl/eLp2cQ Google+ - https://goo.gl/lvC5FX Twitter - https://twitter.com/ProgrammingKnow Pinterest - https://goo.gl/kCInUp Text Case Converter - https://goo.gl/pVpcwL -------------------------Stuff I use to make videos ------------------- Stuff I use to make videos Windows notebook – http://amzn.to/2zcXPyF Apple MacBook Pro – http://amzn.to/2BTJBZ7 Ubuntu notebook - https://amzn.to/2GE4giY Desktop - http://amzn.to/2zct252 Microphone – http://amzn.to/2zcYbW1 notebook mouse – http://amzn.to/2BVs4Q3 ------------------Facebook Links ---------------------------------------- http://fb.me/ProgrammingKnowledgeLearning/ http://fb.me/AndroidTutorialsForBeginners http://fb.me/Programmingknowledge http://fb.me/CppProgrammingLanguage http://fb.me/JavaTutorialsAndCode http://fb.me/SQLiteTutorial http://fb.me/UbuntuLinuxTutorials http://fb.me/EasyOnlineConverter Password Encryption.java JAVA ENCRYPTION/DECRYPTION PROGRAM HELP Encrypting and Decrypting Java Cryptography using Java in Netbeans IDE Cryptography using Java in Netbeans IDE Java Cryptography APIs Cryptography Encrypting and Decrypting a text file in java
Views: 96069 ProgrammingKnowledge
10 Weird Applications of Public Key Cryptography - Tim Caswell
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: 176 UtahJS
Developer's Guide to JavaScript and Web Cryptography
The increasing capabilities and performance of the web platform allow for more feature-rich user experiences. How can JavaScript based applications utilize information security and cryptography principles? This session will explore the current state of JavaScript and Web Cryptography. We will review some basic concepts and definitions, discuss the role of TLS/SSL, show some working examples that apply cryptography to real-world use cases and take a peek at the upcoming W3C WebCryptoAPI. Code samples will use CryptoJS in the browser and the Node.js Crypto module on the server. An extended example will secure the popular TodoMVC project using PBKDF2 for key generation, HMAC for data integrity and AES for encryption. Slides available on Google Docs: https://docs.google.com/presentation/d/1Sx5ODjh_4lgfYgPNY3RqFzL4snvBbcGZ6byOn78K2ME/edit?usp=sharing
Views: 2953 Kevin Hakanson
Implementing Proof-of-Work in Javascript (Blockchain, part 2)
Adding the proof-of-work mechanism to our homemade Javascript blockchain. Proof-of-work will secure our blockchain against spammers and people trying to tamper with our blocks. ► Source code Available on GitHub: https://github.com/SavjeeTutorials/SavjeeCoin ►►► Buying Bitcoin or Ethereum Get $10 for free when buying through my affiliate link (thanks!): https://goo.gl/G9NQsu ► About me 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be ✉️ Subscribe to newsletter: https://goo.gl/nueDfz 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Introduction to JWT (JSON Web Token) - Securing apps & services
-What is JWT (JSON Web Token) -What is the structure of JWT -What are Header, Payload (claims) and Signature of JWT -How is JWT used in applications -How to create, tamper and verify JWT (understanding JWT, with no code)
Views: 165184 Tech CBT
ShmooCon 2015 - NaCl Crypto Library
CyberPunk http://n0where.net
Views: 954 Ra Darth
Invited Talk: Failures of secret key cryptography
Invited talk by Daniel Bernstein at FSE 2013.
Views: 1997 TheIACR
Reverse engineering obfuscated JavaScript - PopUnder Chrome 59
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 -------------------------------------- Twitter: https://twitter.com/LiveOverflow Website: http://liveoverflow.com/ Subreddit: https://www.reddit.com/r/LiveOverflow/ Facebook: https://www.facebook.com/LiveOverflow/
Views: 58305 LiveOverflow
Encrypt Decrypt Hashing - PHP & MYSQL - Protect your data in your database
Databases are becoming vulnerable to hacking and other means of attack. $10 Free credit for hosting on DigitalOcean https://m.do.co/c/7e7436ae5d07 Please protect the sensitive data in your system. I will show you a couple simple methods to start protecting your database. Update: This method is now out of date, please search for newer solutions.
Views: 83344 Devvid
Network Security - Use Crypto API to Encrypt and Decrypt
Fundamentals of Computer Network Security This specialization in intended for IT professionals, computer programmers, managers, IT security professionals who like to move up ladder, who are seeking to develop network system security skills. Through four courses, we will cover the Design and Analyze Secure Networked Systems, Develop Secure Programs with Basic Cryptography and Crypto API, Hacking and Patching Web Applications, Perform Penetration Testing, and Secure Networked Systems with Firewall and IDS, which will prepare you to perform tasks as Cyber Security Engineer, IT Security Analyst, and Cyber Security Analyst. course 2 Basic Cryptography and Programming with Crypto API: About this course: In this MOOC, we will learn the basic concepts and principles of cryptography, apply basic cryptoanalysis to decrypt messages encrypted with mono-alphabetic substitution cipher, and discuss the strongest encryption technique of the one-time-pad and related quantum key distribution systems. We will also learn the efficient symmetric key cryptography algorithms for encrypting data, discuss the DES and AES standards, study the criteria for selecting AES standard, present the block cipher operating modes and discuss how they can prevent and detect the block swapping attacks, and examine how to defend against replay attacks. We will learn the Diffie-Hellman Symmetric Key Exchange Protocol to generate a symmetric key for two parties to communicate over insecure channel. We will learn the modular arithmetic and the Euler Totient Theorem to appreciate the RSA Asymmetric Crypto Algorithm, and use OpenSSL utility to realize the basic operations of RSA Crypto Algorithm. Armed with these knowledge, we learn how to use PHP Crypto API to write secure programs for encrypting and decrypting documents and for signing and verify documents. We then apply these techniques to enhance the registration process of a web site which ensures the account created is actually requested by the owner of the email account. Develop Secure Programs with Crypto API In this module, we learn how to use Crypto API to write secure programs for encrypting and decrypting documents, and for signing and verify documents. We then apply the techniques to enhance the registration process of a web site which ensures the account created is actually belonging to the owner of the email account the request profile. Learning Objectives • Develop secure programs with Crypto API for encryption, authentication, and integrity checking • Enhance the registration process of the web site by using the crypto api • Create and utilize the Crypto API to sign and verify documents Subscribe at: https://www.coursera.org
Views: 160 intrigano
HOPE Number Nine (2012): Why Browser Cryptography is Bad and How We Can Make It Great
Saturday, July 14, 2012: 10:00 am (Nutt): Web apps are becoming almost exponentially responsible for handling user data. This incredible increase summons an urgent requirement for client-side web browser crypto standards. However, web browsers lack client-side crypto standards for building blocks such as secure block ciphers, public key schemes, and hashing algorithms. Developers currently rely on JavaScript crypto libraries in order to implement these functions, which can, admittedly, provide strong crypto in some situations, but still falter when faced with certain attacks. This talk will look at Cryptocat, a security-centric web-chat client with client-side cryptography, and also focus on the problems, the solutions, and the limitations of JavaScript cryptography. There will be a discussion of potential solutions to these problems, which may very well require the implementation of an integrated universal web browser standard for client-side cryptography. Hosted by Nadim Kobeissi
Views: 42 Channel2600
Will Quantum Computers break encryption?
How do you secure messages over the internet? How do quantum computers break it? How do you fix it? Why don't you watch the video to find out? Why does this description have so many questions? Why are you still reading? What is the meaning of life? Facebook: https://www.facebook.com/frameofessence Twitter: https://twitter.com/frameofessence YouTube: https://www.youtube.com/user/frameofessence CLARIFICATIONS: You don't actually need a quantum computer to do quantum-safe encryption. As briefly mentioned at 7:04 , there are encryption schemes that can be run on regular computers that can't be broken by quantum computers. CORRECTIONS: [2:18] Technically, you can use any key to encrypt or decrypt whatever you want. But there's a specific way to use them that's useful, which is what's shown in the video. [5:36] In RSA, depending on exactly what you mean by "private key", neither key is actually derivable from the other. When they are created, they are generated together from a common base (not just the public key from the private key). But typically, the file that stores the "private key" actually contains a bit more information than just the private key. For example, in PKCS #1 RSA private key format ( https://tools.ietf.org/html/rfc3447#appendix-A.1.2 ), the file technically contains the entire public key too. So in short, you technically can't get the public key from the private key or vice versa, but the file that contains the private key can hold more than just the private key alone, making it possible to retrieve the public key from it. Video links: Encryption and HUGE numbers - Numberphile https://youtu.be/M7kEpw1tn50 The No Cloning Theorem - minutephysics https://youtu.be/owPC60Ue0BE Quantum Entanglement & Spooky Action at a Distance - Veritasium https://youtu.be/ZuvK-od647c Sources: Quantum Computing for Computer Scientists http://books.google.ca/books/about/Quantum_Computing_for_Computer_Scientist.html?id=eTT0FsHA5DAC Random person talking about Quantum MITM attacks http://crypto.stackexchange.com/questions/2719/is-quantum-key-distribution-safe-against-mitm-attacks-too The Ekert Protocol (i.e. E91) http://www.ux1.eiu.edu/~nilic/Nina's-article.pdf Annealing vs. Universal Quantum Computers https://medium.com/quantum-bits/what-s-the-difference-between-quantum-annealing-and-universal-gate-quantum-computers-c5e5099175a1 Images, Documents, and Screenshots: Post-Quantum Cryptography initiatives http://csrc.nist.gov/groups/ST/post-quantum-crypto/cfp-announce-dec2016.html http://pqcrypto.eu.org/docs/initial-recommendations.pdf Internet map (Carna Botnet) http://census2012.sourceforge.net/ Quantum network maps https://www.slideshare.net/ADVAOpticalNetworking/how-to-quantumsecure-optical-networks http://www.secoqc.net/html/press/pressmedia.html IBM Quantum http://research.ibm.com/ibm-q/ Music: YouTube audio library: Blue Skies Incompetech: Jay Jay Pamgaea The House of Leaves Premium Beat: Cutting Edge Technology Second Time Around Swoosh 1 sound effect came from here: http://soundbible.com/682-Swoosh-1.html ...and is under this license: https://creativecommons.org/licenses/sampling+/1.0/
Views: 524861 Frame of Essence
How to do Encryption And Decryption in JQuery | www.jqueryexamplecode.blogspot.com
http://jqueryexamplecode.blogspot.in/2014/04/how-to-do-encryption-and-decryption.html Most of the times, we have give encrypt and decrypt our security in the browser operation. In this JQuery example i am going to explain how to do encrypt and decrypt our security data and how to disable and enable button using JQuery. Here we using third party plug-in for doing encryption and decryption operations using JQuery.
Views: 4072 JQuery Example Code
Encryption and Decryption In CodeIgniter | Best Example for Security | Secure your Data 🔥🔥
Data encryption and decryption is nothing but just converting a plain text into something that appears to be random and meaningless and vice verse. Generally this encryption is opted by the developers to make the data secured like for password, URL, credit card numbers and so on. If you are using CodeIgniter than to encrypt the data becomes much more easier as compared to native PHP code. As C.I. provides its own encryption class which you can use to encrypt or decrypt the data. Join Group : https://www.facebook.com/groups/1981858225403035/ Facebook page : https://www.facebook.com/tutorialspoint2016/ This video series covers creating mini project using codeigniter framework in Hindi/Urdu & this video covers creating pagination on articles list on dashboard. Learn New Technologies -- Visit Our Channel -- https://www.youtube.com/tutorialspoint2016 1) CodeIgniter Mini Project Tutorial in Hindi/Urdu Using Angular JS & Boostrap 3 : https://goo.gl/FSwsJ4 2) Codeigniter Tutorial for Beginners Step by Step in Hindi : https://goo.gl/bxG6gJ 3) PDO-OOP-PHP-CRUD-with-Bootstrap : https://goo.gl/q1KRTn 4) AngularJS Tutorial for Beginners (For Absolute Beginners ) : https://goo.gl/Hak26N 5) JSON Tutorial for Beginner : https://goo.gl/ryPu35 6) Git and GitHub Training In Hindi : https://goo.gl/HpToSd 7) Java Tutorial For Beginners (Step by Step tutorial) : https://goo.gl/QxJ68x 8) PHP Tutorial for Beginners (For Absolute Beginners) : https://goo.gl/S3urkU 9) OOPS Tutorial for Beginners in PHP : https://goo.gl/k2kJDM 10) Bootstrap Tutorial for Beginners : https://goo.gl/NGFDse 11) Magic Methods in PHP Tutorial : https://goo.gl/BdYLfJ 12) Build a PHP MVC Application : https://goo.gl/yqDCkb 13) Whats new in PHP 7 | (Introduction) : https://goo.gl/rTTKkr 14) CRUD with PHP and MySQLi Tutorial : https://goo.gl/yyjWD7 15) Technology Tips and Tricks : https://goo.gl/MpR952 16) MongoDB Tutorial for Beginners (Hindi) : https://goo.gl/NZXD1u Any questions or suggestions you may have, let me know in the comments below and I will try to reply as soon as I can. You can connect with us in social Media :- Youtube : https://www.youtube.com/tutorialspoint2016 Twitter: https://twitter.com/tutorialspoint2 facebook : https://www.facebook.com/tutorialspoint2016 Instragram : https://www.instagram.com/tutorialspoint2016 Google plus : https://plus.google.com/+TutorialsPoint2016 Blogger : http://tutorialspoint2016.blogspot.in/ Don't forget to hit the Subscribe & Like button!
Views: 2092 Technical Suneja
RSA Algorithm Implemented in Python
Github link: https://github.com/MatthewCLind/Crypto_Practice
Views: 1782 Matthew Lind
Cryptographic Key Management APIs - Graham Steel
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: 5127 secappdev.org
RSA Implemented in JavaScript (Keygen part 5) - Pwn Adventure 3
Part 19: I implemented the KeyGen in JavaScript based on the algorithms we reversed from the assembler code. The used the dlc unlock code to solve the last challenge - Pirate's Treasure. Keygen: http://liveoverflow.com/poc/keygen.html 🌴 Playlist: https://www.youtube.com/playlist?list=PLhixgUqwRTjzzBeFSHXrw9DnQtssdAwgG -------------------------------------- Twitter: https://twitter.com/LiveOverflow Website: http://liveoverflow.com/ Subreddit: https://www.reddit.com/r/LiveOverflow/ Facebook: https://www.facebook.com/LiveOverflow/
Views: 18342 LiveOverflow
Demo: Very early stages of coding an encrypted facebook chat.
Playing with an AES encryption library for JavaScript from Movable Type Scripts: http://www.movable-type.co.uk/scripts/aes.html Using grease monkey, I was able to inject javascript and encrypt and decrypt messages in a chat session. This is a very early proof of concept though. There is a lot I need to change in the usability. I also need to learn how to handle the XMLHttpRequest (AJAX) events, and use RSA to distribute the AES key between facebook users.
Views: 170 n2fole00
Python3 Advanced Tutorial 10 - PyCrypto
This is a tutorial on PyCrypto, looking at encrypting and decrypting files using AES-256. All Links and Slides will be in the description. Subscribe for more cool stuff! Slides & files - https://www.mediafire.com/folder/blqyh7qotgu2r/Tutorial_10_-_PyCrypto Python - http://python.org/ Ubuntu - http://www.ubuntu.com/ Steam Group: http://steamcommunity.com/groups/DrapsTV Twitter: https://twitter.com/DrapsTV Ello: https://ello.co/drapstv If you like what you see be sure to subscribe and thumbs up!
Views: 24639 DrapsTV
Coding Math: Episode 52 - Pseudo Random Number Generators, Part II
This time we look at a couple of existing PRNG libraries available in JavaScript, and look at some examples of how PRNGs can be used in cryptography, games, and generative art. Support Coding Math: http://patreon.com/codingmath Source Code: Crypto: http://jsbin.com/kipequk/2/edit?js,console Landscape: http://jsbin.com/zizeje/1/edit?js,output Circles: http://jsbin.com/zizeje/2/edit?js,output
Views: 5349 Coding Math
Encrypt/Decrypt with RSA (storing the keys in files)
Source Code Project http://microify.com/1Tgn
Views: 2363 Melardev
Bill Automata - Require Cyrpto is a Human Right - CascadiaFest 2016
An accessible tour of the Node.js Crypto API through the lens of history and politics. * Diffie-Hellman & RSA: key generation, encrypt, and decrypt. * RSA sign and verify. * AES and other symmetric ciphers. Almost everything in OpenSSL has a rich history. A lot of the code we link when compiling Node.js was once illegal to disseminate under treaties that regulate things like fighter jets and night vision. The effort to weaken these tools is still underway. You can't help fight that effort unless you are knowledgeable of more than just the basic implementation details. By the end of the talk you will have been exposed to the important concepts, applied and theoretical, necessary to use strong cryptography in any of your Node.js projects. I'll crack some weak keys of different types in realtime using the cluster API and some spare cloud resources if my company has any spare AWS reserved instances. I'll also leave you with a drive to protect access to strong cryptography all over the world.
Views: 143 Cascadia JS
Zero Knowledge Proofs in Node.JS - London Node User Group - August 2018
Zero Knowledge Proofs are one of cryptography's best hidden gems and they're behind recent advancements in privacy conscious crypto-currencies. We're going to see how to use them in node.js and improve your applications' security, whether centralised or distributed. About the speaker: Federico Rampazzo is a Software Entrepreneur and Engineer with a passion for Functional Programming, Cryptography and Payments (especially as in "receiving payments" - but also Payment System architectures). He works for Tes, the biggest community of educators in the world and home to an excellent marketplace for teachers' resources. @framp (Tes) _ About Pusher Sessions: We're bringing the meetup to you. With Sessions, you can watch recordings of top-notch talks from developer meetups -- wherever and whenever you want. Meetups are a great way to learn from our peers and to keep up with the latest trends and technologies. As developers ourselves, we at Pusher wanted to bring this great content to more people... So we built Sessions. On Sessions, you can watch talks that interest you and subscribe to be notified when new content gets added. If you run a meetup and want to get involved, kindly get in touch. _ About Pusher: Pusher is a hosted service with APIs, developer tools and open source libraries that greatly simplify integrating real-time functionality into web and mobile applications. Pusher will automatically scale when required, removing all the pain of setting up and maintaining a secure, real-time infrastructure. Pusher is already trusted to do so by thousands of developers and companies like GitHub, MailChimp, the Financial Times, Buffer and many more. Getting started takes just a few seconds: simply go to pusher.com and create a free account. Happy hacking!
Views: 160 Pusher
Understanding the execution flow of the binary - White Box Unboxing 1/4 - RHme3 Qualifier
We start to reverse engineer a crypto binary with Hopper. Challenge: https://github.com/Riscure/Rhme-2017/tree/master/prequalifications/White%20Box%20Unboxing -------------------------------------- Twitter: https://twitter.com/LiveOverflow Website: http://liveoverflow.com/ Subreddit: https://www.reddit.com/r/LiveOverflow/ Facebook: https://www.facebook.com/LiveOverflow/
Views: 10203 LiveOverflow
Brennan Novak: Secure Crypto for Browser Based Apps | JSConf EU 2014
Between Snowden’s NSA leaks prompting more secure communication and the rise of cryptocurrencies- software with secure cryptography as a core component is on the rise. Meanwhile, powerful applications written in JavaScript that render their UIs in a web browser are seeing unprecedented growth. However, if you ask most security researchers and developers about secure crypto in the browser, they’ll shake their heads skeptically. Reasons for this being: there are a lack of quality crypto primitives written in JavaScript that’ve been adequately reviewed and tested, JavaScript yields weak random number generation in all but the most recent HTML5 browsers, and secure key storage is difficult as the idiom du jour of web applications is to store user data on a remote server or in localStorage. This talk will explore how Mailpile, a Free / open source email client, is not vulnerable to these security concerns by shifting the attack surface out of the browser while still being a web application with a friendly JSON API. The gain being developers can leverage modern JavaScript libraries to render beautiful interfaces, animate fresh user interactions, and create compelling data visualziations. Want to make a force-directed graph of your inbox? JavaScript makes it easy, all while being extremely secure. Transcript: http://2014.jsconf.eu/speakers/brennan-novak-secure-crypto-for-browser-based-apps.html License: For reuse of this video under a more permissive license please get in touch with us. The speakers retain the copyright for their performances.
Views: 939 JSConf
Reverse engineering PopUnder trick for Chrome 60
Reversing obfuscated JavaScript of a pop-under technique for Google Chrome version 60 on Windows. Chrome 60 Mac: https://bugs.chromium.org/p/chromium/issues/detail?id=752630 Chrome 60 Windows: https://bugs.chromium.org/p/chromium/issues/detail?id=752824 -------------------------------------- Twitter: https://twitter.com/LiveOverflow Website: http://liveoverflow.com/ Subreddit: https://www.reddit.com/r/LiveOverflow/ Facebook: https://www.facebook.com/LiveOverflow/
Views: 39630 LiveOverflow
29C3: FactHacks (EN)
Speakers: djb | Nadia Heninger | Tanja Lange RSA factorization in the real world RSA is the dominant public-key cryptosystem on the Internet. This talk will explain the state of the art in techniques for the attacker to figure out your secret RSA keys. A typical 1024-bit RSA public key is a product of two secret 512-bit primes. The security of the cryptosystem relies on an attacker being unable to compute the user's secret primes. The attacker can try guessing one of the secret primes and checking whether it divides the user's public key, but this is very unlikely to work: there are more than 2^500 512-bit primes, far beyond the number of atoms in the universe. Fortunately for the attacker, there are much faster ways to figure out the secret primes. Some of the danger is visible in public announcements of factorization records by academic teams; the largest publicly factored RSA key, announced in 2009, has 768 bits. But what does this mean for the security of 1024-bit RSA? There are several different reasons that a real-world attacker doesn't have to play by the rules of an academic challenge. Sometimes users have bad random-number generators; sometimes users generate both primes from a single search; sometimes users choose special primes to try to make RSA run faster; sometimes users leak secret bits through side channels; sometimes the attacker has a botnet, or a 65-megawatt data center in Utah or Tianjin. This talk will assess the real-world threat to RSA-1024, explaining what the best attacks can do and how you can replicate them in your very own home or local GPU farm. Attack algorithms will be presented as Python code snippets and will already be online before the talk. This is a joint presentation by Daniel J. Bernstein, Nadia Heninger, and Tanja Lange, surveying work by many people. For more information visit: http://bit.ly/29C3_information To download the video visit: http://bit.ly/29C3_videos Playlist 28C3: http://bit.ly/29C3_playlist
Views: 975 Christiaan008
Cryptography Best Practices - Bart Preneel
Application architects need to make informed choices to use cryptography well: + Alternative key architectures have their merits and drawbacks. PKIs, in particular, should be contrasted with symmetric key architectures such as Kerberos. + Network protocol characteristics are pivotal in ensuring distributed applications meet security requirements. Key strength choices impact on security guarantees offered, as do cryptographic algorithm modes. + While strong keys and wise use of cryptographic algorithms may thwart cryptanalytic attack, applications are insecure without prudent key management. In this context, key generation and key storage require particular attention. + The selection of crypto-libraries requires awareness of inherent library qualities and failures. Application developers are advised not to implement their own. Learning objectives + decide if and when cryptography should be used. + make informed key architecture and management decisions. + use appropriate algorithms and parameters. + select an appropriate cryptographic library. + choose network protocols for distributed applications. This lecture was delivered by Bart Preneel at SecAppDev 2013 in Leuven, Belgium. Professor Bart Preneel of KU Leuven heads the COSIC (COmputer Security and Industrial Cryptography) research group. His main research area is information security with a focus on cryptographic algorithms and protocols as well as their applications to both computer and network security, and mobile communications. He teaches cryptology, network security and coding theory at the KU Leuven and was visiting professor at the Ruhr Universitaet Bochum (Germany), the T.U.Graz (Austria), the University of Bergen (Norway), and the Universiteit Gent (Belgium). In '93-'94 he was a research fellow at the University of California at Berkeley. He has taught intensive courses around the world. He undertakes industrial consulting (Mastercard International, S.W.I.F.T., Proton World International,...), and participates in the work of ISO/IEC JTC1/SC27/WG2. Professor Preneel is Vice President of the International Association for Cryptologic Research (IACR) and co-founder and chairman of LSEC vzw (Leuven Security Excellence Consortium).
Views: 2849 secappdev.org
فك تشفير اكواد الجافا سكربت بسهولة وكسر حمايات حقوق التصميم و غيرها Decrypt Java script بالتفصيل
فك تشفير اكواد java بسهولة وكسر حمايات حقوق التصميم و غيرها Decrypt Java script بالتفصيل الممل كل الروابط و المتطلبات تجدونها هنا : http://www.wejdane.com/2016/05/how-to-decrypt-java-script.html صفحتنا على الفيسبوك : https://www.facebook.com/wejdane.blogger حسابنا على تويتر : https://goo.gl/Gq0FNv ملاحظة : لكل من لديه مشكل ف فك التشفير او يريد مساعدة في فك تشفير كود جافا يتصل بي و انشاء لن اتاخر في المساعدة ----------------------------------------------------------------------------------------------------------- كلمات دلالية : فك تشفير java فك تشفير اكواد الجافا في القوالب decrypt javascript code decrypt javascript decrypt javascript online decrypt java decrypt javascript code online decrypt java class file decrypt javascript file decrypt java code decrypt javascript eval decrypt java class file online decrypt java keystore password decrypt java class decrypt java password online decrypt java password decrypt java online decrypt java bytecode decrypt base64 java java decrypt blowfish java decrypt by public key java encryption blowfish example java decrypt byte array decrypt java code online decryption java code java decrypt caesar cipher java decrypt caesar decrypt ciphertext java encryption java code java decrypt des java decrypt desede encryption java database encryption java des java encryption data java encryption des example java encryption des3 encrypt decrypt des java encrypt decrypt data java decrypt des java example decrypt java example java decrypt encrypt java decrypt encrypt string java decrypt encrypt password encryption java example encryption java example aes encrypt decrypt java example md5 decrypt java example decrypt rsa java example java encryption example code decrypt java file encryption java file java encryption framework java encryption function java encryption file example encryption for java java encryption for password java encryption files encrypt decrypt java gui java encryption generate key java decrypt gpg file java decrypt given final block not properly padded java decrypt gpg java decrypt gnupg java encryption given final block not properly padded java encryption guide java gpg decrypt example decrypt java hash decrypt java hashcode java encryption hash java decrypt md5 hash string java decrypt hmac java decrypt hmac-sha1 java decrypt hmac sha256 java decrypt https java decrypt https request decrypt hmac sha1 java decrypt in java encryption in java encryption in java example encryption in java tutorial encryption in java code encryption in java using public key encryption in java using aes encryption in java pdf encryption in java program encryption in java using rsa java decrypt ltpa token java decrypt ldap password java decrypt large file java encryption library java encryption library open source java encryption library example java encryption library download decrypt java md5 java decrypt md5 example java decrypt md5 password decrypt method java java decrypt_sa java decrypt openssl decryption java program decrypt password java code java decrypt using rsa decrypt java.security.invalidkeyexception parameters missing decrypt sha1 java java decrypt string decrypt sha1 java code java decrypt sha1 password encryption java source code encryption java sample encrypt decrypt java string java encryption string decrypt text java encryption java tutorial java encryption types java encryption triple des example java encryption tutorial aes java encryption text java encryption triple des java encryption text file encrypt decrypt text java java decrypt triple des java decrypt using public key encryption using java java encryption using public key java encryption using aes encryption using java code encryption url java java encryption using rsa java encryption using triple des java decrypt vigenere java decrypt with private key java decrypt with public key java decrypt with rsa private key encryption with java java encryption with key java encryption with public key java encryption with aes java encryption with private key encryption with java example java encryption with password decrypt xor java java decrypt xml encryption xor java encryption xml java java decrypt x509 certificate java decrypt with x 509 java encryption xtea java xor decrypt file java decrypt xor encryption java decrypt zip java decrypt zip file java encryption zip java encryption zip file java decrypt aes 128 java encryption 1024 java encryption 1.7 java decrypt aes 128 cbc how to decrypt sha1 in java java encryption 256 bit java encryption 256 java decrypt aes 256 java decrypt aes 256 cbc java decrypt rijndael 256 java decrypt sha256 java decrypt mcrypt_rijndael_256 decrypt 3des java java encryption 3des java encryption 3des example java 3des decrypt example how to decrypt sha512 in java decrypt pkcs#7 java encryption java 8
Create Key and Certification using OpenSSL
Create Key and Certification using OpenSSL the website : http://www.hacksparrow.com/node-js-https-ssl-certificate.html I used it to Create Server in localhost using nodejs so i needed certification and key to do it. the website which i follow to create https server : https://www.hacksparrow.com/express-js-https-server-client-example.html
Views: 1412 Ahmad Al-Weshahi
CppCon 2015: Jens Weller “An Overview on Encryption in C++"
http://www.Cppcon.org — Presentation Slides, PDFs, Source Code and other presenter materials are available at: https://github.com/cppcon/cppcon2015 — Encryption has become a very important topic for C++ developers and this session will serve as an introduction and overview this topic. I will present an overview on the popular encryption libraries cryptopp, botan and libsodium, and give you an update on the popular encryption algorithms of AES and RSA, plus why cryptoboxes can be a great help. — Jens Weller has worked, since 2007, as a freelancer in C++, specialising in consulting, training and programming C++. He started with programming C++ back in 1998. He is an active member of the European C++ community and the founder of the Meeting C++ platform and conference. Jens is an active supporter of C++ user groups and blogs often about C++. — Videos Filmed & Edited by Bash Films: http://www.BashFilms.com
Views: 2290 CppCon
Bitcoin, Blockchain and Node - Portia Burton, The Atlantic Magazine
Bitcoin, Blockchain and Node - Portia Burton, The Atlantic Magazine
Views: 6623 node.js
Managing encryption of data in the cloud (Google Cloud Next '17)
Can management of encryption keys be easier in the cloud than on-premise? During this video, Maya Kaczorowski discusses the continuum of encryption options available, from encryption of data at rest by default, to Cloud Key Management System, to Customer Supplied Encryption Keys. You'll learn how our encryption tools allow management of your own keys, including generation, rotation and destruction of those keys. She also shares best practices for managing and securing secrets. Missed the conference? Watch all the talks here: https://goo.gl/c1Vs3h Watch more talks about Infrastructure & Operations here: https://goo.gl/k2LOYG
Views: 7064 Google Cloud Platform
29C3: Re-igniting the crypto-wars on the web (2012)
http://events.ccc.de/congress/2012/Fahrplan/events/5374.en.html RE-IGNITING THE CRYPTO WARS ON THE WEB This talk will give an overview of the ongoing work by the W3C on a controversial general purpose Javascript cryptography API in context of the larger desire to create trusted and encrypted cloud services with rich web applications. Today, cryptography is difficult to use and the Web is an insecure environment at best, but can this situation be improved and cryptography be put in the hands of ordinary developers and users? The W3C specification, currently under development, will be described, as well as its interaction with other parts of the emerging Web Security Model at the W3C and IETF such as Content Security Policy, HTTP Strict Transport Security, and Certificate Transparency. A number of use-cases, ranging from decentralized identity systems to secure cloud services for activists, will be detailed. As the specification will be under active development until autumn 2013, feedback from the hacker community is needed! Recently, the W3C has released as a First Public Working Draft the Web Cryptography API [1], which defines a number of cryptographic primitives to be deployed across browsers and native Javascript environments. This proposal is moving fast, and will likely be finalized by the end of 2013 and in all major browsers shortly thereafter, as browser vendors Google, Microsoft, Mozilla, and Opera are all on board. As has been discussed in a number of blog-posts [2], cryptography in Javascript on the Web is an unsafe bet at best today (Javascript Crypto O RLY?), although technically the Web Crypto API is a WebIDL that could be bound to programming languages beyond Javascript. Even with excellent implementations such as the Stanford Javascript Crypto Library [3], browsers still do not have basic cryptographic functionality not provided natively by Javascript, such as key storage. Yet is Javascript cryptography doomed on the Web? Much of the critique of Javascript cryptography boils down to a critique of current Web browsers, and as has been shown by the W3C and browser vendors - the Web Platform can evolve. Due to TLS, almost every web browser and operating system already contains well-verified and reviewed cryptographic algorithms. At its core, the Web Cryptography API will simply expose this functionality to WebApp developers, with a focus on essential features such as cryptographically strong random number generation, constant-time cryptographic primitives, and a secure keystore. Without these functions, Javascript web cryptography would be impossible. Yet we realize the Web Cryptography API is only a single component in building the emerging Web Security model that is necessary to make the Web part of a trusted environment. For example, one open issue is whether or not applications using the Web Cryptography API also should be required to use Content Security Policy (and attendant work such as HSTS) to prevent XSS attacks [4]. Indeed, should and can browser vendors and the W3C as a whole tackle the malleability of the browser Javascript run-time environment? Furthermore, can we use the Cryptography API to manipulate and check certificates, as is needed by proposals such as the new IETF Certificate Transparency proposal? Without a doubt these security considerations are of utmost importance, and getting them right to enable cryptography on the Web will require holistic thinking about attack surfaces and threat models. There are a number of use-cases, ranging from decentralized identity systems to secure cloud services for activists, will be detailed - including some One issue with the Web Cryptography API is that the Working Group decided to expose the low-level functionality first rather than aiming only for a high-level API aimed at the developer on the street who may not have a grasp of the finer details of cryptography. The Working Group did this on purpose after taking a survey of users [5], in order to allow experienced developers to build the functionality needed across the largest number of use-cases, but a "high-level" API similar to KeyCzar that makes using cryptography easy for Web developers will also be presented. A second issue is that the current Web Cryptography API exposes legacy cryptographic algorithms that can be used insecurely, which was done in the draft to allow Web Application developers to create applications with interoperability with widely used applications such as GPG, SSH, and the like. A number of thorny issues will be presented, and feedback from the audience will be encouraged. Speaker: Harry Halpin EventID: 5374 Event: 29th Chaos Communication Congress (29c3) by the Chaos Computer Club [CCC] Location: Congress Centrum Hamburg (CCH); Am Dammtor; Marseiller Straße; 20355 Hamburg; Germany Language: english Start: 27.12.2012 17:15:00 +01:00 License: CC-by-nc-sa
Views: 308 Aa
Encrypting and Decrypting Files with OpenSSL on Windows and GNU/Linux
Cifrando y Descifrando Archivos con OpenSSL en Windows y GNU/Linux Playlist: https://www.youtube.com/playlist?list=PLdtRZtGMukf6ijg-IBONzDTBgC8AhWM9a Files and Support: http://techemergente2.blogspot.com/p/cisco-ccna-routing-and-switching-cisco.html
Simple Custom Encryption / Decryption  of Files using Python
This video explains how to Encrypt / Decrypt Files with a key using Python. A very simple process to encrypt the files. Very basic implementation . In video a Image is encrypted but it can be applied for any file format. The key value can range from 0 to 255 Resources XOR operator https://en.wikipedia.org/wiki/XOR_gate Enumerate Python https://docs.python.org/2/library/functions.html#enumerate
Views: 2379 akbweb
Cryptography & Obfuscation - MultiObfuscator v2 Demo
Views: 1713 EmbeddedSW.net
Introduction to Bitcoin with Yours Bitcoin, Lecture 2: Private Keys and Public Keys
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: 904 Yours
Block Chain Utilizing Polymorphic Encryption
Existing BlockChains use standard hash functions and in most cases asymmetric encryption algorithms where the algorithm is public and also the implementation code is made public. This surely opens the door for known attacks especially side channel attacks. Using The Polymorphic Block Cipher is faster and more secure when compared to asymmetric cryptographic algorithms that is vulnerable to future quantum computer attacks. The key distribution issues of symmetric encryption can be resolved using different methods such as El-Gamal encryption or even Key Hiding techniques.
Views: 101 Magdy Saeb
Introduction to Cryptoeconomics - Vitalik Buterin
Slides: http://vitalik.ca/files/intro_cryptoeconomics.pdf
Views: 40932 Ethereum Foundation

Andrew w mellon dissertation completion fellowship
Sample cover letter for personal secretary
Alcohol powerpoint presentation high school
Newcrest mining annual report 2019
Who to report scams to