re off the shelf cheap des keyseach machine in article apr ulysses att com smb research att com steven bellovin writes and key size is one of the things that can be verified externally gee say they feed the bit key through snefru and take the first bits of the result then use those bits as the real key how do you figure out that each key is one of equal keys you can try a birthday attack but if the key can be changed only once a second then you will need several lifetimes to get reliable statistics somehow i don t think you could catch the nsa at this sort of skulduggery dan
