Method and apparatus for security in a data processing system

Details Method and apparatus for security in a data processing system Method and apparatus for security in a data processing system

H - Electricity

04

W

H04W 12/04 (2009.01) H04L 9/08 (2006.01)

Patent

CA 2442656

Method and apparatus for secure transmissions. Each user is provided a registration key. A long-time updated broadcast key is encrypted using the registration key and provided periodically to a user. A short-time updated key is encrypted using the broadcast key and provided periodically to a user. Broadcasts are then encrypted using the short-time key, wherein the user decrypts the broadcast message using the short-time key.

L'invention concerne un procédé et un appareil de transmissions sécurisées. On attribue à chaque utilisateur une clé d'enregistrement. Un clé de diffusion longue durée mise à jour est chiffrée au moyen de la clé d'enregistrement et fournie périodiquement à l'utilisateur. Une clé courte durée mise à jour est chiffrée au moyen de la clé de diffusion et fournie périodiquement à l'utilisateur. Les diffusions sont ensuite chiffrées au moyen de la clé courte durée, l'utilisateur déchiffrant alors le message diffusé au moyen de la clé courte durée.

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