des init vector as additional key the recent discussion in this news group suggests that a key search attack against des is quite feasible now but normally des is applied in cbc or cfb mode where one chooses a random init vector of bytes questions makes it sense to handle the init vector as an additional key then we have a bit key if yes is anything known about the security of this key scheme can we break it faster than by exhaustive search through the bit key space klaus pommerening institut fuer medizinische statistik und dokumentation der johannes gutenberg universitaet obere zahlbacher strasse w mainz germany
