>If speed is really a concern, you could do a 640 or 768 bit modulus Hilarie suggested exactly this in private mail, and I've agreed. I'm going to generate a 768-bit optional modulus. Bill has also suggested a killer 4096-bit modulus for the truly paranoid. Not sure my poor 32MB P90 can handle that without thrashing its guts out, but I'll give it a try. Phil