Secure one-way authentication communication system

Details Secure one-way authentication communication system Secure one-way authentication communication system

H - Electricity

04

L

H04L 9/32 (2006.01) G07F 7/10 (2006.01)

Patent

CA 2320221

A protocol for authenticating at least one of a pair of first and second correspondents C and T in a data communication system, the method comprising the steps of storing a public key in the first correspondent C; computing a shared secret by the second correspondent T incorporating the public key C; storing the shared secret in the first correspondent C; the second correspondent T generating a challenge value .CHI.; the first correspondent C transmitting to the second correspondent T information including the stored public key C; the second correspondent T computing a test shared secret from the received public key C; the first and second correspondents computing response signals using the challenge value .CHI. and the shared secret in a one-way function f1; and the first correspondent C transmitting the computed response signal to the second correspondent T whereby the second correspondent verifies the first correspondent.

Cette invention se rapporte à un protocole servant à authentifier au moins un correspondant d'une paire de premier et second correspondants (C et T) dans un système de communication de données. Ce procédé consiste: à mémoriser une clé publique dans le premier correspondant C; à calculer un secret partagé par le second correspondant T contenant la clé publique C; à mémoriser ce secret partagé dans le premier correspondant C; le second correspondant T produisant une valeur de vérification ( chi ); le premier correspondant C transmettant au second correspondant T des informations contenant la clé publique mémorisée C; le second correspondant T calculant un secret partagé de test fourni par la clé publique reçue C; le premier et le second correspondant calculant des signaux de réponse en utilisant la valeur de vérification ( chi ) et le secret partagé dans une fonction unidirectionnelle (f1); et le premier correspondant C transmettant ce signal de réponse calculé au second correspondant T, afin que le second correspondant vérifie l'identité du premier correspondant.

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