Search results “Pycrypto aes initialization vector”
Python AES Encryption/Decryption using PyCrypto Tutorial
In this tutorial, we will learn Encryption/Decryption for AES CBC mode using PyCrypto. All links for source code, text based tutorial and further reading material will be in the description below. Detailed Text Based Tutorial http://www.letscodepro.com/encryption-in-python-using-pycrypto/ Gihub Source Code Link https://github.com/the-javapocalypse/Python-File-Encryptor Further Reading Material http://searchsecurity.techtarget.com/definition/cipher https://defuse.ca/cbcmodeiv.htm https://www.di-mgt.com.au/cryptopad.html http://www.cryptofails.com/post/70059609995/crypto-noobs-1-initialization-vectors Please Subscribe! And like. And comment. That's what keeps me going. Follow Me Facebook: https://www.facebook.com/javapocalypse Instagram: https://www.instagram.com/javapocalypse
Views: 7350 Javapocalypse
Encryption: ECB v CBC
http://asecuritysite.com/subjects/chapter58 I forgot to add the key to each of the stages of CBC.
Views: 13976 Bill Buchanan OBE
Cipher Block Chaining Mode - Applied Cryptography
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 53568 Udacity
Introduction to Symmetric Encryption using Openssl
Author: Jeremy Druin Twitter: @webpwnized Description: A light introduction to using OpenSSL to symmetrically encrypt text. The AES cipher is used in the sample with a 256 key, a salt and cipher block chaining mode. The sample is decrypted as well. Encryption theory is not discussed. This is only a practical exercise in performing symmetric encryption. Thank you for watching. Please support this channel. Up vote, subscribe or even donate by clicking "Support" at https://www.youtube.com/user/webpwnized!
Views: 1716 webpwnized
Security Snippets: AES/CCM
The tutorial is here: http://www.asecuritysite.com/Encryption/ccmaes
Views: 2561 Bill Buchanan OBE
Counter Mode CTR
This video is about Counter Mode CTR
Views: 2152 Liew Vin Sern
CBC Implementation - Applied Cryptography
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 893 Udacity
Padding (cryptography)
In cryptography, padding refers to a number of distinct practices. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 1360 Audiopedia
AES Encryption - شرح بالعربي
شرح كامل لطريقة التشفير باستخدام Advanced Encryption Standard Block Cipher بطريقة مبسطة مع حل مثال. - سيف بدران Information Security and Privacy - AES Block Cipher Encyption Fully Explained with Example. S-AES , Simplified AES Done By: Saif Badran http://www.facebook.com/saif.badran iTeam Academic Group - JU - Convert from block to state. - Add round key - Sub Byte (S-Box) - Shift Rows - Mix columns multiplication (Hexa)
Views: 46853 iAcademy
3   4  1  More attacks on block ciphers 16 min 001
Coursera Cryptography
Views: 47 Marcel van Vuure
GPU AES-256 Encryption test
Acceleration of AES code from OpenSSL 1.0.1e. Run on single GK104 GPU. Speedup of more than 25x vs CPU implementation. AES-256 Encryption comparison on CPU and GPU (CUDA) on 524MB file: CPU: 2,991 msec GPU: 106 msec Throughput speed: CPU: 175 MB/sec GPU: 4,936 MB/sec http://twistcode.com
Views: 2479 TwistCoder
cryptography - Padding Oracle Attacks
Cryptography To get certificate subscribe: https://www.coursera.org/learn/cryptography ======================== Playlist URL: https://www.youtube.com/playlist?list=PL2jykFOD1AWb07OLBdFI2QIHvPo3aTTeu ============================ Youtube channel: https://www.youtube.com/user/intrigano ============================ https://scsa.ge/en/online-courses/ https://www.facebook.com/cyberassociation/
Views: 3922 intrigano
File Encryption - Applied Cryptography
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 1675 Udacity
MouseJack: Injecting Keystrokes into Wireless Mice. Marc Newlin explains MouseJack at DEF CON 24
What if your wireless mouse was an effective attack vector? Research reveals this to be the case for mice from Logitech, Microsoft, Dell, Lenovo, Hewlett-Packard, Gigabyte, and Amazon. Dubbed 'MouseJack', this class of security vulnerabilities allows keystroke injection into non-Bluetooth wireless mice. Imagine you are catching up on some work at the airport, and you reach into your laptop bag to pull out your phone charger. As you glance back at your screen, you see the tail end of an ASCII art progress bar followed by your shell history getting cleared. Before you realize what has happened, an attacker has already installed malware on your laptop. Or maybe they just exfiltrated a git repository and your SSH keys. In the time it took you to plug in your phone, you got MouseJacked. The attacker is camped out at the other end of the terminal, equipped with a commodity USB radio dongle and a directional patch antenna hidden in a backpack, and boards her plane as soon as the deed is done. The reality of MouseJack is that an attacker can inject keystrokes into your wireless mouse dongle from over 200 meters away, at a rate of up to 7500 keystrokes per minute (one every 8ms). Most wireless keyboards encrypt the data going between the keyboard and computer in order to deter sniffing, but wireless mouse traffic is generally unencrypted. The result is that wireless mice and keyboards ship with USB dongles that can support both encrypted and unencrypted RF packets. A series of implementation flaws makes it possible for an attacker to inject keystrokes directly into a victim's USB dongle using easily accessible, cheap hardware, in most cases only requiring that the user has a wireless mouse. The majority of affected USB dongles are unpatchable, making it likely that vulnerable computers will be common in the wild for the foreseeable future. This talk will explain the research process that lead to the discovery of these vulnerabilities, covering specific tools and techniques. Results of the research will be detailed, including protocol behavior, packet formats, and technical specifics of each vulnerability. Additional vulnerabilities affecting 14 vendors are currently in disclosure, and will be revealed during this talk. Marc is a security researcher and software engineer at Bastille Networks, where he focuses on RF/IoT threats present in enterprise environments. He has been hacking on software defined radios since 2013, when he competed as a finalist in the DARPA Spectrum Challenge. In 2011, he wrote software to reassemble shredded documents for the DARPA Shredder Challenge, finishing the competition in third place out of 9000 teams. Twitter: @marcnewlin I reuploaded this video with the YouTube Video Editor (http://www.youtube.com/editor) using the Creative commons license video provided by DEF CON.
Matrix Encrypt Decrypt 03 Encryption Decryption
Matrix is a form arrangement of number, We are using it for many purposes, and in these tutorial videos, I will using it to do Matrices Private/Public keys encryption and decryption of message. (I will using Excel to demo)
Views: 68 Tom Lee
2012 UTOSC - Breaking Encryption (Aaron Toponce)
Encryption is used everywhere. It's critical to many infrastructures. It can secure our banking. It can secure our data on our hard drives. It can secure our email and chat communication. However, it can only protect us if it is implemented correctly. If it is implemented incorrectly, it can leak a great deal of information about the data it is supposed to protect. I will show in this presentation what happens when encryption isn't implemented correctly, and how you can leak data out as a result.The topics that will be covered in this presentation are: * Electronic codeblock * Cipherblock chaining * Initialization vectors * Random versus pseudorandom number generators * AES * RSA * LUKS * Snapshot attackThe presentation will cover a scenario where encrypted drives are being stored offsite as backups. We will see how someone at the backup site can mount an attack against the encrypted backups, and potentially recover data, using this King of attacks. By the end of the presentation, system administrators and users should be familiar enough with how to implement encrypted backups correctly, to prevent data leaks.The presentation is mainly targeted at system administrators, but is straight forward enough for beginners. It will provide a number of commands that can be typed at the terminal, and everything will be documented heavily.
Views: 376 Steve Meyers
security beginner 2 0 certified hacking training monitoring transmitted  4
Programming Education The best and the most extensive Ethical Hacking Training program on the ... Certified experts (CISS, MCSE:MS, CEH, CISSP) have created courses from Beginner to Advanced level. ... Become CISS – Certified IT Security Specialist by covering the following ... Myths #2 - you don't need any protection software or hardware.
Views: 1926 Programming Education
Secure Messaging with Steganography
This is a presentation I did of a final project for a Applied Cryptography class I did about Secure Messaging with Stenography. I created the application in python, it has a GUI written using Tkinter. The application defends against the following attacks: replay, tampering, chosen ciphertext attack, chosen plaintext attack, known plaintext attack, known ciphertext attack and against an eavesdropper. These are the things I did to try my best to make this application cryptographically secure: a) pseudo-random data properly seeded to he microsecond b) Uses pseudo-random session tokens and time-stamps to protect against replay attacks c) AES-256 in CBC mode to encrypt the messages d) Encrypted message scattered in bits within the image to hide ciphertext (Steganography in action!) e) Every message is uniquely salted (64 bits) and an Initialization Vector, IV, of 128 bits of pseudo-random data f) The shared secret password is never used directly, instead, a derived key is created from it using a Key Derivation Function (KDF) with 10,240 iterations g) Seals integrity and authenticity information to validate the image the ciphertext travels in into a tamper-proof HMAC message sent to the receiver after sending the steganographic image.
Views: 333 Carlos Villegas
BEAST: An Explanation of the CBC Attack on TLS
This is an explanation of the BEAST attack. For more details, check this blog: http://commandlinefanatic.com/cgi-bin/showarticle.cgi?article=art027
Views: 3738 David Wong
Introduction to CBC Bit-Flipping Attack
Author: Jeremy Druin Twitter: @webpwnized Description: This video shows a solution to the view-user-privilege-level in Mutillidae. Before viewing, review how XOR works and more importantly that XOR is communicative (If A xor B = C then it must be true that A xor C = B and also true that B xor C = A). The attack in the video takes advanatage that the attacker knows the IV (initialization vector) and the plaintext (user ID). The attack works by flipping each byte in the IV to see what effect is produced on the plaintext (User ID). When the correct byte is located, the ciphertext for that byte is recovered followed by a determination of the correct byte to inject. The correct value is injected to cause the User ID to change. Mutillidae is available for download at http://sourceforge.net/projects/mutillidae/. Updates about Mutillidae are tweeted to @webpwnized along with annoucements about video releases. Thank you for watching. Please support this channel. Up vote, subscribe or even donate by clicking "Support" at https://www.youtube.com/user/webpwnized!
Views: 5279 webpwnized
KRACK - Key Reinstallation Attacks: Forcing Nonce Reuse in WPA2
KRACK: https://www.krackattacks.com Read the paper! https://papers.mathyvanhoef.com/ccs2017.pdf Some interesting discussion about the formal protocol verification: https://blog.cryptographyengineering.com/2017/10/16/falling-through-the-kracks/ -------------------------------------- Twitter: https://twitter.com/LiveOverflow Website: http://liveoverflow.com/ Subreddit: https://www.reddit.com/r/LiveOverflow/ Facebook: https://www.facebook.com/LiveOverflow/
Views: 49473 LiveOverflow
C++ 11 Lambda Functions
In this video we'll look at a new style for implementing anonymous functions in C++ 11 and above. They're called Lambda functions, and they allow us to define little functions right where we need them, instead of adding a prototype, and a function in some header. The Lambda syntax does not offer anything we could not otherwise program, but they are convenient, and they can help to reduce the overall amount of code in our projects. Become a patron and support What's a Creel programming vids on Patreon: www.patreon.com/whatsacreel Play Intergalactic Memory for Free: http://apps.microsoft.com/windows/en-us/app/intergalactic-memory-free/92c1094c-32f5-4730-86f3-c43c46affe52 Full version of Intergalactic Memory: http://apps.microsoft.com/windows/app/intergalactic-memory/ae9457e6-dbc1-468b-93cb-39f80835f19a FaceBook: www.facebook.com/pages/WhatsaCreel/167732956665435
Views: 31868 What's a Creel?
Defeat 2FA token because of bad randomness - rhme2 Twistword (Misc 400)
Generating random numbers on computers is not easy. And while the intended solution was really hard, the challenge had a problem with the random number generation, which allowed me to solve it. Clarification from Andres Moreno (riscure) on the challenge: "The "official" challenge solution involved reading the tiny Mersenne twister (tinyMT) paper, writing some equations, and using a solver. The tinyMT is tricky to initialize. Giving a proper seed is not enough. You need to provide initial state matrices with certain properties (there is a generator for this). The challenge used improper initialized matrices (zeros) that reduced the PRNG period. During tests, we found that ~12hr were needed to solve the challenge (solver time only), but we did not test the amount of entropy reduction by improper state initialization. Fortunately, the problem was not in the PRNG." -------------------------------------- Twitter: https://twitter.com/LiveOverflow Website: http://liveoverflow.com/ Subreddit: https://www.reddit.com/r/LiveOverflow/
Views: 11374 LiveOverflow
Crypto Defenses for Real-World System Threats - Kenn White - Ann Arbor
Modern encryption techniques provide several important security properties, well known to most practitioners. Or are they? What are in fact the guarantees of, say, HTTPS TLS cipher suites using authenticated encryption, IPSec vs. SSL VPNs, Property Preserving Encryption, or token vaults? We live in an era of embedded Hardware Security Modules that cost less than $1 in volume, and countless options now exist for encrypting streaming network data, files, volumes, and even entire databases. Let's take a deep dive into the edge of developed practice to discuss real-world threat scenarios to public cloud and IoT data, and look closely at how we can address specific technical risks with our current encryption toolkits. Advanced math not required. Bio: Kenneth White is a security researcher whose work focuses on networks and global systems. He is co-director of the Open Crypto Audit Project (OCAP), currently managing a large-scale audit of OpenSSL on behalf of the Linux Foundation's Core Infrastructure Initiative. Previously, White was Principal Scientist at Washington DC-based Social & Scientific Systems where he led the engineering team that designed and ran global operations and security for the largest clinical trial network in the world, with research centers in over 100 countries. White co-founded CBX Group which provides security services to major organizations including World Health, UNICEF, Doctors without Borders, the US State Department, and BAO Systems. Together with Matthew Green, White co-founded the TrueCrypt audit project, a community-driven initiative to conduct the first comprehensive cryptanalysis and public security audit of the widely used TrueCrypt encryption software. White holds a Masters from Harvard and is a PhD candidate in neuroscience and cognitive science, with applied research in real-time classification and machine learning. His work on network security and forensics and been cited by media including the Wall Street Journal, Forbes, Reuters, Wired and Nature. White is a technical reviewer for the Software Engineering Institute, and publishes and speaks frequently on computational modeling, security engineering, and trust. He tweets @kennwhite.
Views: 819 Duo Security
DEF CON 23 - Colin Flynn -   Dont Whisper my Chips: Sidechannel and Glitching for Fun and Profit
If you thought the security practices of regular software was bad, just wait until you start learning about the security of embedded hardware systems. Recent open-source hardware tools have made this field accessible to a wider range of researchers, and this presentation will show you how to perform these attacks for equipment costing $200. Attacks against a variety of real systems will be presented: AES-256 bootloaders, internet of things devices, hardware crypto tokens, and more. All of the attacks can be replicated by the attendees, using either their own tools if such equipped (such as oscilloscopes and pulse generators), the open-hardware ChipWhisperer-Lite, or an FPGA board of their own design. The hands-on nature of this talk is designed to introduce you to the field, and give you the confidence to pick up some online tutorials or books and work through them. Even if you've never tried hardware hacking before, the availability of open-source hardware makes it possible to follow published tutorials and learn all about side-channel power analysis and glitching attacks for yourself. Speaker Bio: Colin O'Flynn has been working with security on embedded systems for several years. He has designed the open-source ChipWhisperer project which won 2nd place in the 2014 Hackaday Prize, and developed an even lower-cost version called the ChipWhisperer-Lite, which was the focus of a Kickstarter in 2015. Twitter: @colinoflynn
Views: 6596 DEFCONConference
Google I/O 2010 - Go Programming
Google I/O 2010 - Go Programming Tech Talks Rob Pike, Russ Cox The Go Programming Language was released as an open source project in late 2009. This session will illustrate how programming in Go differs from other languages through a set of examples demonstrating features particular to Go. These include concurrency, embedded types, methods on any type, and program construction using interfaces. Very little time will be spent waiting for compilation. For all I/O 2010 sessions, please go to http://code.google.com/events/io/2010/sessions.html
Views: 94261 Google Developers
Best macOS Preview App Features
In this video, we're going to go over some of the best features that the macOS Preview app has to offer. Read More - https://www.macrumors.com/how-to/get-the-most-from-the-macos-preview-app
Views: 17554 MacRumors
Week 7
Views: 30781 CS50