H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 9/08 (2006.01) G07F 7/10 (2006.01) H04L 9/28 (2006.01)
Patent
CA 2166895
Method and apparatus for producing a key common to two devices, belonging to different sets, for implementing a common cryptographic procedure. According to the invention, each device is assigned a mother key (KC, KP), and at least one daughter key (KPck, PCpi) based on the mother key of the other device and on the identification data belonging to the device. During the procedure, both devices exchange their identification data (ck, pi) which, when processed with the assigned mother key, provide the daughter key (KCpi, KPck) of the other device. The pair of keys consisting of the assigned daughter key and the calculated daughter key forms the common key.
L'invention concerne un procédé et un appareil pour produire une clé commune à deux dispositifs, appartenant à des ensembles différents et ayant à mettre en oeuvre une procédure cryptographique commune. Selon l'invention, on attribue à chaque dispositif d'une part une clé mère (KC, KP), d'autre part au moins un clé fille (KPck, KCpi) élaborée à partir de la clé mère de l'autre dispositif et d'une donnée identification propre au dispositif et, lors de la procédure, les deux dispositifs s'échangent leur donnée d'identification (ck, pi) qui, traitée à l'aide de la clé mère détenue, donnera la clé fille (KCpi, KPck) de l'autre dispositif. Le couple de clés fommé par la clé fille détenue et la clé fille calculée constitue la clé commune.
Dawirs Michel
Hazard Michel
Moulart Yves
Cp8 Transac
Goudreau Gage Dubuc
LandOfFree
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