As the introduction to the excellent Matasano Crypto Challenges says,
There are tens, probably hundreds, of obscure little things you can do to take a cryptosystem that should be secure even against an adversary with more CPU cores than there are atoms in the solar system, and make it solvable with a Perl script and 15 seconds.
There are tens, probably hundreds, of obscure little things you can do to take a cryptosystem that should be secure even against an adversary with more CPU cores than there are atoms in the solar system, and make it solvable with a Perl script and 15 seconds.
