Patent ID: 7036015
Filing Date: 2006-04-25
Classification: G06F,H04L

Abstract:
1. A method of establishing a session key between a pair of correspondents in a data communication system, each of said correspondents sharing secret information, said method comprising the steps of: a) one of said correspondents generating additional secret information and deriving therefrom a session key; b) said one of said correspondents combining said secret information and said additional secret information in a signal algorithm to provide a first signature component; c) said one of said correspondents deriving a second signature component from said secret information; d) said one of said correspondents transferring said first and second signature components to the other of said correspondents; e) said other of said correspondents using said secret information to obtain said additional secret information from said first signature component and generating a said session key from said secret information and said additional secret information; and f) said other of said correspondents verifying said second signature component by operating upon said session key obtained at said other of said correspondents to obtain a value corresponding to said second signature component and comparing such value with said second signature component.