Faith-based cryptography

Despite urging by the Yemen-based al Qaida leader Anwar Al Anlaki, Karim also rejected the use of a sophisticated code program called "Mujhaddin Secrets", which implements all the AES candidate cyphers, "because 'kaffirs', or non-believers, know about it so it must be less secure."

but somehow the kaffirs figured it out

Thanx to Bruce Schneier