basically the argument is that this is an encryption algorithm that is deterministic as there is no randomness, after the initial value. This sounds more like a

basically the argument is that this is an encryption algorithm that is deterministic as there is no randomness, after the initial value. This sounds more like a Random Oracle, http://en.wikipedia.org/wiki/Random_oracle http://en.wikipedia.org/wiki/Random_oracle. which by the way don't exist