Ninefingers

[professor rat]

" . . . 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/f9ca111554f8235887b77702f1dc2733b014796d2e47536187e147e38b15a01d/