Broken block ciphers

Crab (cipher)

In cryptography, Crab is a block cipher proposed by Burt Kaliski and Matt Robshaw at the first Fast Software Encryption workshop in 1993. Not really intended for use, Crab was developed to demonstrate how ideas from hash functions could be used to create a fast cipher. Crab has an unusually large block size of 8192 bits. Its creators suggested using an 80-bit key, but the cipher could use any key size. The authors didn't specify an actual key schedule, only that the key is used to generate two large sets of subkeys: a permutation of the numbers 0 through 255, and an array of 2048 32-bit numbers. The block is divided into 256 32-bit subblocks, which are permuted at the beginning. Then the algorithm makes four passes over the data, each time applying one of four transformations adapted from MD5. A brief note on the cryptanalysis of Crab is included in Markku-Juhani Saarinen's paper on block ciphers based on SHA-1 and MD5, published at FSE 2003. The author demonstrates a weakness in Crab that permits a distinguisher using no more than a dozen chosen plaintexts, and speculates that this can be converted into a full key-recovery attack using no more than 216 chosen plaintexts. Such an attack would depend on the key schedule used. (Wikipedia).

Video thumbnail

Recipe: Filming Horseshoe Crab Eggs

Here’s how @KQEDDeepLook and @pbsterra's #Overview filmed horseshoe crab eggs for our collaboration video! https://youtu.be/PSX4NvvgmJM 🐴👞🦀 🥚 #shorts

From playlist Behind The Scenes

Video thumbnail

This Is Not A Crab

Find your wonderful, signed, limited edition art print by Emily Graslie right here: https://store.dftba.com/collections/bizarrebeasts/products/emily-graslie-print There are creatures in the sea hiding their true natures, defying our attempts to easily classify them, deceiving us into beli

From playlist Bonus Beasts & Chill Beats to Study To

Video thumbnail

What's Really Inside Fake Crab Meat?

From California rolls to crab cakes, imitation crab meat pops up everywhere. But what is imitation crab meat made of? It contains no actual crab but a fish paste called "surimi." Science Insider tells you all you need to know about science: space, medicine, biotech, physiology, and more.

From playlist What's Inside

Video thumbnail

Watch an Octopus Pursue Crab in Mesmerizing Chase | National Geographic

Watch a deadly game of chase between an octopus and a crab. Filmed in Rose Bay, Sydney, Australia, the octopus pursues the crab by inhaling water and contracting muscles that shoot it out through a siphon, propelling the octopus in any direction. It uses its agile tentacles to reach out an

From playlist News | National Geographic

Video thumbnail

Watch: Carrier Crab Uses Spiny Urchin As Shield | National Geographic

Watch a carrier crab live up to its name by carrying a sea urchin on its back for protection. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class sci

From playlist News | National Geographic

Video thumbnail

I know Kung Fu! (or neo4j on Rails without jRuby)

"Reality is a graph, embrace it!" Sure graph databases are really cool and have a timestamp dated next week, but do you know when you should actually use one? Sometimes living on the bleeding edge pays off and in this talk, I'll show you how you can simplify your application and model your

From playlist Cascadia Ruby 2012

Video thumbnail

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

Video thumbnail

The COOLEST Escape Puzzle I've EVER Solved!! (Yo-ho-ho Chest)

MY SHOP: https://www.1st.shop/ Escape games: https://www.er-ecodecor.com/ Wes' Channel: https://www.youtube.com/c/WesBarker Today I'm going to attempt this amazing pirate adventure escape puzzle! With the help of my Friend Wes Barker.. I've also got a surprise in store for Wes... Enjoy! Ga

From playlist Puzzles!

Video thumbnail

Carrier Crab Carries Cover | National Geographic

A carrier crab uses a sea urchin's spines for a shield from predators. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers,

From playlist National Geographic Top Videos of 2009

Video thumbnail

Experience Life as a Crab (360 Video)

Enjoy Deadliest Catch from a completely new perspective: Opilio crab being sorted on board the F/V Wizard! Subscribe to Discovery: http://bit.ly/SubscribeDiscovery For more immersive experiences, head to http://DiscoveryVR.com or download the app for your iPhone or Android device. iPho

From playlist Discovery VR (360 Videos)

Video thumbnail

Maine Lobster Bisque

Recipe at: http://www.ciaprochef.com/mainelobster/01a-recipe1.html Chef Scott Samuel from The Culinary Institute of America shows us a classic lobster dish: Maine Lobster bisque. He demonstrates key techniques for building and developing a richly flavored base, including the addition of b

From playlist Culinary Institute of America: Cooking Demonstrations | CosmoLearning.org Culinary

Video thumbnail

Crab Pulsar and Crab Nebula - Universe Sandbox² and Space Engine

Hello and welcome to What Da Math! In this video, we will talk about the mysterious Crab Nebula and Crab Pulsar. Patreon page: https://www.patreon.com/user?u=2318196&ty=h Enjoy and please subscribe. Other videos here: https://www.youtube.com/playlist?list=PL9hNFus3sjE7jgrGJYkZeTpR7lnyVA

From playlist Universe Sandbox 2

Video thumbnail

Black Mesa LP Blind PART 31: Laser Guided Amnesia -- Chapter 11

Black Mesa is released! In this video series I play through the game (as far as has been released so far), trying my best to pay attention to all detail, hence "longplay". I also try to do some additional research and provide informative bulletins on various details within the game, whenev

From playlist Black Mesa - Blind Longplay

Video thumbnail

Follow-up: Barbie electronic typewriter

Here is a copy of the description from the Barbie video: ---- I first found this story on the crypto museum website, which has great information about the Barbie typewriter (and other cipher machines) https://www.cryptomuseum.com/crypto/mehano/barbie/ ------- Thanks to Sarah Everett fr

From playlist My Maths Videos

Video thumbnail

Symmetric Key Ciphers

Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in

From playlist Computer - Cryptography and Network Security

Video thumbnail

Edureka Ethical Hacking Webinar | Ethical Hacking Tutorial For Beginners | Edureka Masterclass

(Edureka Meetup Community: http://bit.ly/2DQO5PL) Join our Meetup community and get access to 100+ tech webinars/ month for FREE: http://bit.ly/2DQO5PL Topics to be covered in this session: 1. What is Hacking? 2. What is Ethical Hacking? 3. How Does Ethical Hacking Work? 4. Hands-On Know

From playlist Webinars by Edureka!

Video thumbnail

Live CEOing Ep 544: Language Design in Wolfram Language [Ciphers & WFR Submissions] [Part 01]

In this episode of Live CEOing, Stephen Wolfram discusses upcoming improvements and features to the Wolfram Language. If you'd like to contribute to the discussion in future episodes, you can participate through this YouTube channel or through the official Twitch channel of Stephen Wolfram

From playlist Behind the Scenes in Real-Life Software Design

Video thumbnail

Cryptography (part 2 of 3)

An informal introduction to cryptography. Part of a larger series teaching programming at http://codeschool.org

From playlist Cryptography

Video thumbnail

Shannons Theory (Contd...2)

Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in

From playlist Computer - Cryptography and Network Security

Video thumbnail

Maine Lobster Smørrebrød on Sprouted Rye Bread

Recipe at: http://www.ciaprochef.com/mainelobster/01a-recipe4.html Chef Scott Samuel from The Culinary Institute of America shows us how to make a Maine Lobster Smørrebrød. A smørrebrød is an open-faced Danish sandwich that is commonly topped with seafood and pickled vegetables. He pairs

From playlist Culinary Institute of America: Cooking Demonstrations | CosmoLearning.org Culinary

Related pages

Key size | SHA-1 | Block cipher | Key schedule | Block size (cryptography) | Cryptographic hash function | MD5 | SHACAL | Distinguishing attack | Differential cryptanalysis | Cryptography