Patent ID: 7996676
Filing Date: 2011-08-09
Classification: G06Q,G07F,H04L

Abstract:
1. A method of signing a message m, in a public key data communication system, by a correspondent having a long term private key d and a corresponding long term public key derived from said long term private key d; said method comprising: (a) generating in a secure computer system a first short term private key k; (b) computing in said secure computer system a first short term public key from said first short term private key k; (c) computing a first signature component r in said secure computer system by using said first short term public key; (d) generating a second short term private key t in said secure computer system; (e) computing a second signature component s in said secure computer system using said second short term private key t, said message m, said long term private key d, and said first signature component r, (f) computing a third signature component c in said secure computer system using said first short term private key k and said second short term private key t; (g) said secure computer system forwarding said signature components (r, s, c) as a masked digital signature of said message m to a receiver computer system associated with said secure computer system; (h) computing in said receiver computer system a regular signature component (i) sending said signature components (