In cryptography, RC5 is a symmetric-key block cipher notable for its simplicity. Designed by Ronald Rivest in 1994, RC stands for "Rivest Cipher", or alternatively, "Ron's Code" (compare RC2 and RC4). The Advanced Encryption Standard (AES) candidate RC6 was based on RC5. (Wikipedia).
What is the 4th Dimension REALLY? - 4D Golf Devlog #2
A more practical explanation for those interested in exploring 4D spaces. For those not already familiar with basic 4D concepts, here's some videos I can recommend: "Visualizing 4D Geometry" https://www.youtube.com/watch?v=4URVJ3D8e8k "The things you'll find in higher dimensions" https:/
From playlist 4D Golf
Police Scanner: Equipment Autopsy #68
http://thegeekgroup.org/ - We explore the worlds of analog and digital radio as Chris opens up two different types of scanners. First is an old police scanner, which it tuned up by use of quartz crystal. It's followed by a more modern hand radio, which has made the switch to a completely d
From playlist Equipment Autopsies
Lone Star Ruby Conference 2011 - Rails 3.1 Whirlwind Tour by Ben Scheirman
Rails 3.1 introduces a lot of new changes. In this session we'll cover most of the changes, including how to take advantage of them. From Reversible Migrations, the new Asset Pipeline, Coffee Script, SASS, and even HTTP Streaming. This will be a code-heavy talk demonstrating many of the ne
From playlist Lone Star Ruby Conference 2011
How To Identify Unknown Crypto Functions [ Reverse Engineering AMA ]
How do you identify unknown crypto and compression algorithms when reverse engineering? -- Big thanks to all the reverse engineers who helped us put this together! Rattle (Jesko) https://twitter.com/huettenhain https://github.com/binref/refinery Jordan (psifertex) https://twitter.com/p
From playlist Reverse Engineering AMA Questions
Modification of "Spherical 4R mechanism 2a" and "Spherical 4R mechanism 2b". Because it is a combination of two spherical 4R joints, angles between line connecting two joint centers and the shaft axles must be set equal to each other in order to get constant velocity.
From playlist Mechanisms
Aerial photography from a ParkZone Radian?
Just a thought...I used a FlyCamOne v2 camera with the lens pointed straight down to get some aerial shots. The wind did not help as it was moderate and buffeting, but with a little more altitude, an HD wide angle camera...the Radian could be a viable aerial photography platform...?
From playlist RC Glider
Lone Star Ruby Conference 2011 Much Ado About CoffeeScript by Matt Thompson
CoffeeScript will ship with Rails 3.1 to replace RJS as the preferred way to dynamically generate JavaScript. It's a new language that take the best parts of Ruby, Python, and others to ease the worst parts of JavaScript. More than being the new kid on the Rails block however, CoffeeScript
From playlist Lone Star Ruby Conference 2011
The Sham Marriage Racket (Immigration Law Documentary) | Real Stories
Entering the dark underworld of the sham marriage racket Filming undercover, and with exclusive access to a busy register office, Ranvir Singh investigates sham marriages. We will be looking at the current challenges and enforcement measures associated with sham marriages, including the im
From playlist Crime Documentaries
DEFCON 19: Familiarity Breeds Contempt
Speakers: Sandy "Mouse" Clark University of Pennsylvania | Brad "RenderMan" Haines Chief research monkey, Renderlab.net "Good programmers write code, great programmers reuse" is one of the most well known truisms of software development. But what does that mean for security? For over 30 y
From playlist DEFCON 19
Music - "Reunited" by RH Soundtracks http://www.rhsoundtracks.net/
From playlist BAGUETTE
NOTACON 3: Encryption For Programmers
Speaker: Riscphree This talk will discuss encryption from a programmer's perspective. Topics will include a beginners rundown of terms and small introduction to cryptography, legalities concerning the development of cryptographic material, basic concepts and examples, and finally, ethics.
From playlist NOTACON 3
25c3: Lightning Talks Day3 - Morning
Speakers: Sven Guckes, Oliver Pritzkow 4 minutes of fame 4 minutes for every speaker. Learn about the good, the bad, and the ugly - in software, hardware, projects, and more. Give a lightning fast talk about your favourite project, program, system - and thereby find people with th
From playlist 25C3: Nothing to hide
Asymptotic spectra and their applications I - Jeroen Zuiddam
Computer Science/Discrete Mathematics Seminar II Topic: Asymptotic spectra and their applications I Speaker: Jeroen Zuiddam Affiliation: Member, School of Mathematics Date: October 9, 2018 For more video please visit http://video.ias.edu
From playlist Mathematics
工程师谈强化学习 Part 5 | 克服强化学习中的实际问题
查看本系列视频中的其他几个视频： Part 2 - 了解环境与奖励: https://youtu.be/0ODB_DvMiDI Part 3 - 策略和学习算法: https://youtu.be/7cF3VzP5EDI Part 4 - 行走机器人示例: https://youtu.be/Wypc1a-1ZYA Part 5 -克服强化学习中的实际问题: https://youtu.be/zHV3UcH-nr0 在这段视频中，我将解决一些不太容易注意到的进入生产部署环节的强化学习问题，并尝试提供一些方法来缓和这些问题。即使没有直接的方法来解决你将面临的一些挑战，至少
From playlist 强化学习
4C Properties of the Transpose
The properties of the transpose of a matrix.
From playlist Linear Algebra
Stanford Seminar - Wireless Power Transfer and RF Energy Harvesting, Joshua R. Smith
"Wireless Power Transfer and RF Energy Harvesting: New Options for System Designers" -Joshua R. Smith, University of Washington Colloquium on Computer Systems Seminar Series (EE380) presents the current research in design, implementation, analysis, and use of computer systems. Topics rang
From playlist Engineering