World Library  
Flag as Inappropriate
Email this Article

S-1 block cipher

Article Id: WHEBN0000482324
Reproduction Date:

Title: S-1 block cipher  
Author: World Heritage Encyclopedia
Language: English
Subject: Iraqi block cipher, WikiProject Cryptography, Cryptography newsgroups, Block ciphers, Internet hoaxes
Collection: 1995 Hoaxes, Block Ciphers, Internet Hoaxes
Publisher: World Heritage Encyclopedia
Publication
Date:
 

S-1 block cipher

In cryptography, the S-1 block cipher was a block cipher posted in source code form on Usenet on 11 August 1995.[1] Although incorrect security markings immediately indicated a hoax, there were several features of the code which suggested it might be leaked source code for the Skipjack cipher, which was still classified at the time.

However once David Wagner had discovered a severe design flaw], involving the key schedule but not the underlying round function, it was generally accepted as being a hoax—but one with an astonishing amount of work behind it. Bruce Schneier noted that S-1 contained feature never seen before in the open literature; a G-table that results in key and data dependent rotation of S-boxes to use in a given round [https://groups.google.com/d/msg/sci.crypt/l4nsjVu27lU/LIycdmVxJZ0J. When Skipjack was eventually declassified in 1998, it was indeed found to be totally unlike S-1.

See also

References

  1. ^ Anonymous (1995-08-09). "this looked like it might be interesting".  
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.