" . . . You don't have to kill or maim some to induce cooperation, and biometric devices can be designed to pretty much require that the subject be living.  Extortion or seduction are both quite viable, and work with any security system.  Biometrics don't really add anything. Your point is just as meaningful for cryptography.  All strong crypto does is move the weak spot around. Incidentally, I have heard (from a probably reliable source) that the best biometric is a retina scan -- very reliable, hard to spoof, *very* few false negatives. . . " FROM https://mailing-list-archive.cryptoanarchy.wiki/archive/1997/05/f9ca111554f8...