G - Physics – 07 – F
Patent
G - Physics
07
F
G07F 7/12 (2006.01) G06K 19/06 (2006.01) G07F 7/10 (2006.01) H04L 9/32 (2006.01)
Patent
CA 2228958
A method of verifying a pair of correspondents in electronic transaction the correspondents each including a first and second signature schemes and wherein the first signature scheme is computationally more difficult in signing than verifying and the second signature scheme is computationally more difficult in verifying than signing. The method comprises the step of the first correspondent signing information according to the first signature scheme and transmitting the first signature to the second correspondent, the second correspondent verifying the first signature received from the first correspondent, wherein the verification is performed according to the first signature scheme. The second correspondent then signs information according to the second signature scheme and transmits the second signature to the first correspondent, the first correspondent verifies the second signature received from the second correspondent, wherein the verification is performed according to the second signature algorithm; the transaction is rejected if either verification fails. The method thereby allows one of the correspondents to participate with relatively little computing power while maintaining security of the transaction.
Méthode permettant de vérifier une paire de correspondants dans une transaction électronique. Les correspondants ont chacun un premier et un deuxième schèmes de signature, la signature étant du point de vue informatique plus difficile que la vérification dans le premier schème, et inversement dans le second. La méthode comprend les étapes suivantes : le premier correspondant signe l'information selon le premier schème de signature et transmet la première signature au deuxième correspondant, qui la vérifie selon le premier schème de signature. Le deuxième correspondant signe ensuite l'information selon le deuxième schème de signature et transmet la deuxième signature au premier correspondant, qui la vérifie selon le deuxième algorithme de signature; la transaction est rejetée si l'une ou l'autre des vérifications échoue. La méthode permet ainsi à l'un des correspondants de participer avec relativement peu de puissance informatique tout en assurant la sécurité de la transaction.
Blake Cassels & Graydon Llp
Certicom Corp.
LandOfFree
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