S-1 482324 179233938 2007-12-20T19:13:50Z Macrakis 49920 S-1 as codeword for atom bomb doesn't belong here {{Otheruses3|S1}} In [[cryptography]], the '''S-1 block cipher''' was a [[block cipher]] posted in [[source code]] form on [[Usenet]] on [[11 August]] [[1995]]. 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 encryption algorithm]], which was still [[classified information|classified]] at the time. However once [[David Wagner]] had discovered a severe design flaw, it was generally accepted as being a hoax - but one with an astonishing amount of work behind it. When Skipjack was eventually declassified in [[1998]], it was indeed found to be totally unlike S-1. == See also == *[[Iraqi block cipher]] ==External links== * [http://groups.google.com/groups?selm=40b50l%24oa8%40utopia.hacktic.nl Original posting on Usenet] {{Crypto navbox | block}} [[Category:Block ciphers]] [[Category:Hoaxes]]