Is each of your 160 permutation arrays a self-inverse or do you generate different arrays for encryption and decryption? No, they are not self inverses. The inverses are computed from the forward arrays to decrypt in electronic codebook mode. Note that in some chaining modes, the reverse mode isn't even needed, and the arrays could

On Tue, 28 Sep 1993, Carl Ellison wrote: literally be filled with random numbers. Mike Johnson Long live the U. S. Constitution!