XKCD author Randall Munroe appears to have left a neat little cryptographic puzzle for Reddit users in his new book. They're trying to decipher it.
posted by zarq on Sep 21, 2009 - 44 comments

Fsaturday Flash Fun: CryptoQuote. Other word games featured at East of the Web are the Tetris-like PopWord (and its multiplayer companion [beginner and advanced, respectively]), the MasterMind-like CodeWord, and the vaguely Scrabble-ish 8 Letters in Search of a Word.
posted by Gator on Jan 7, 2006 - 6 comments

How to Think About Security from Bruce Schneier's Cryptogram. It's a brief discussion with a five point filter to use when evaluating security measures. Good food for thought and best of all, he echos many things I've already spouted off about airport security...
posted by shagoth on Apr 16, 2002 - 2 comments

In the latest Cryptogram newsletter, security expert Bruce Schneier makes some interesting points about voting, voting machines and computers. The web version of this article won't be up for a few weeks so I have reproduced it here. Read more...
posted by lagado on Dec 16, 2000 - 2 comments