H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 9/32 (2006.01)
Patent
CA 2360953
The invention concerns a method wherein one first entity to be authenticated, having a public key v and a secret key s, said keys being connected by v=s<t>(mod n) wherein n is an integer called modulus and t a parameter, and a second authenticating entity, which knows the public key v. Said method comprises zero-knowledge data exchanges between the entity to be authenticated and the authenticating entity and cryptographic computations concerning said data, some of the computations being performed modulo n. The method is characterised in that the modulus n is particular to the authenticated entity, which communicates said modulus to the authenticating entity.
Le procédé met en oeuvre une première entité "à authentifier", possédant une clé publique v et une clé secrète s, ces clés étant reliées par v=s-t(mod n) où n est un entier appelé module et t un paramètre, et une seconde entité "authentifiante", connaissant la clé publique v. Ce procédé comprend des échanges d'informations du type à apport nul de connaissance entre l'entité à authentifier et l'entité authentifiante et des calculs cryptographiques portant sur ces informations, certains calculs étant effectués modulo n. Le procédé de l'invention est caractérisé en ce que le module n est propre à l'entité authentifiée, laquelle communique ce module à l'entité authentifiante
Girault Marc
Pailles Jean-Claude
France Telecom
Goudreau Gage Dubuc
Phentam Dire Nv Llc
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