Synchronization of cryptographic keys between two modules of...

Details Synchronization of cryptographic keys between two modules of... Synchronization of cryptographic keys between two modules of...

H - Electricity

04

L

H04L 9/12 (2006.01) G07B 17/00 (2006.01)

Patent

CA 2238571

SYNCHRONIZATION OF CRYPTOGRAPHIC KEYS BETWEEN TWO MODULES OF A DISTRIBUTED SYSTEM The apparatus comprises: a first module including a universal key; a second module including a unique identifier and a unique key wherein the unique key is derived from the unique identifier and the universal key and incorporated into the second module during manufacture of the second module. The second module is in communication with the first module. The apparatus further comprises a controller for performing the following subsequent to manufacture of the first module and the second module: initiating a communication session between the first module and the second module; transmitting the unique identifier from the second module to the first module; and deriving the unique key in the first module using the unique identifier and the universal key. A method for synchronization of cryptographic keys between modules of a distributed system and a method of manufacturing a postage evidencing system are also provided.

SYNCHRONISATION DES CLES CRYPTOGRAPHIQUES ENTRE DEUX MODULES D'UN SYSTEME REPARTI L'appareil de l'invention comprend un premier module incluant une clé universelle, ainsi qu'un second module incluant un identificateur particulier et une clé particulière, cette clé particulière étant dérivée de l'identificateur particulier et de la clé universelle et étant incorporée au second module durant la fabrication de ce dernier. Le second module est en communication avec le premier. L'appareil comprend également un contrôleur servant à effectuer les opérations suivantes après la fabrication du premier et du second module : ouverture d'une séance de communication entre le premier et le second module; transmission de l'identificateur particulier du second module au premier; et dérivation de la clé particulière dans le premier module à l'aide de l'identificateur particulier et de la clé universelle. Une méthode de synchronisation des clés cryptographiques entre les modules d'un système réparti et une méthode de fabrication d'un système d'affranchissement postal sont également divulguées.

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