Patent ID: 6243811
Filing Date: 2001-06-05
Classification: H04L,H04W

Abstract:
A method for updating secret shared data (SSD) at a first party in a wireless communication system, comprising:(a) receiving a random number from a second party as a first challenge, said first challenge being a global challenge from said second party;(b) generating a second random number in response to said first challenge;(c) generating a first challenge response by performing a keyed cryptographic function (KCF) on said first challenge and said second random number using a secondary key;(d) transferring said second random number, as a second challenge, and said first challenge response to said second party;(e) receiving a second challenge response from said second party, said second challenge response being a result of performing said KCF on said second challenge using said secondary key;(f) verifying said second party based on said second challenge and said second challenge response; and(g) establishing said SSD based on said first and second challenges.