RSA accellerators on ISA/PCI cards?

Does anybody have any recommendations for a good RSA accellerator available on an ISA/PCI card? I'm looking for something that can be used with numerous public/private keys, though the ability to have one tamperproof key would be a bonus. Thanks Simon ---- (defun modexpt (x y n) "computes (x^y) mod n" (cond ((= y 0) 1) ((= y 1) (mod x n)) ((evenp y) (mod (expt (modexpt x (/ y 2) n) 2) n)) (t (mod (* x (modexpt x (1- y) n)) n))))