Context limited shared secret

Details Context limited shared secret Context limited shared secret

H - Electricity

04

L

H04L 9/08 (2006.01) H04L 9/00 (2006.01)

Patent

CA 2597763

In a communication system in which two communication entities seek to have a private or confidential communication session, a trust relationship needs first be established. The trust relationship is based on the determination of a shared secret which in turn is generated from contextual information. The contextual information can be derived from the circumstances surrounding the communication session. For example, the contextual information can include topological information, time-based information, and transactional information. The shared secret may be self-generated or received from a third party. In either event, the shared secret may be used as key material for any cryptographic protocol used between the communication entities.

Dans un système de communication dans lequel deux entités de communication souhaitent avoir une session de communication privée ou confidentielle, une relation de confiance doit tout d'abord être rétablie. Cette relation de confiance est basée sur la détermination d'un secret partagé qui a son tour est généré à partir d'informations contextuelles. Ces informations contextuelles peuvent dériver de circonstances englobant la session de communication. Par exemple, les informations contextuelles peuvent contenir des informations topologiques, des informations temporelles, et des informations transactionnelles. Le secret partagé peut être généré automatiquement ou reçu d'une tierce partie. Dans les deux cas, le secret partagé peut être utilisé en tant que matériau clé pour n'importe quel protocole cryptographie utilisé entre les entités de communication.

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