G - Physics – 07 – F
Patent
G - Physics
07
F
G07F 7/10 (2006.01)
Patent
CA 2279462
A method of verifying a pair of correspondents in electronic transaction, the correspondents each including 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.
L'invention concerne un procédé permettant de contrôler une paire de correspondants dans une transaction électronique. Chaque correspondant a un premier et un second mécanisme de signature, le premier mécanisme étant plus difficile, sur le plan informatique, à signer qu'à vérifier, et le second mécanisme étant plus difficile, sur le plan informatique, à vérifier qu'à signer. Selon l'invention, le premier correspondant signe des informations selon le premier mécanisme de signature et transmet la première signature au second correspondant; celui-ci vérifie la première signature reçue du premier correspondant, la vérification s'effectuant selon le premier mécanisme de signature. Puis le second correspondant signe les informations selon le second mécanisme de signature et transmet la seconde signature au premier correspondant; celui-ci vérifie la seconde signature reçue du second correspondant, la vérification s'effectuant selon le second algorithme de signature. La transaction est rejetée si l'une des deux vérifications s'avère négative. Le procédé 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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