It is becoming gradually clearer in cryptanalysis that you can't test security of pieces in isolation. Their interaction with the surrounding code and protocols is key to their security. Ross

I don't think this is a new realization, attacks on crpyto systems have always considered the whole system. _______________________________________________________________________ / These opinions are mine, and not Verity's (except by coincidence;). \ | (\ | | Patrick J. Horgan Verity Inc. \\ Have | | patrick@verity.com 1550 Plymouth Street \\ _ Sword | | Phone : (415)960-7600 Mountain View \\/ Will | | FAX : (415)960-7750 California 94303 _/\\ Travel | \___________________________________________________________\)__________/