https://www.schneier.com/crypto-gram/archives/1998/1215.html#contests https://www.schneier.com/crypto-gram/archives/1998/1215.html... http://thoughtcrime.org/b

https://www.schneier.com/crypto-gram/archives/1998/1215.html#contests https://www.schneier.com/crypto-gram/archives/1998/1215.html... http://thoughtcrime.org/blog/telegram-crypto-challenge/ http://thoughtcrime.org/blog/telegram-crypto-challenge/