Adaptive transparent encryption

H - Electricity – 04 – L

Patent

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H04L 9/00 (2006.01)

Patent

CA 2553648

A technique for adaptive encryption of digital assets such as computer files (102, 102-1, 104-1). The system model monitors passage of files to uncontrollable removable storage media (204, 214) or through network connections and the like (108) which may indicate possible abuse of access rights. In accordance with a preferred embodiment, an autonomous independent agent process (622) running at a point of use (102), such a background process in a client operating system kernel, interrupts request for access to resources (603-1). The agent process senses low level system events, filters, and aggregates them (530). A policy engine (590) analyzes sequences of aggregate events to determine (595) when to apply encryption (612).

L'invention concerne une technique de chiffrement adaptatif de biens numériques, tels que des fichiers informatiques. Le modèle de système surveille le passage des fichiers sur des supports de stockage amovibles non contrôlables ou via des connexions réseau et analogues qui peuvent indiquer d'éventuels abus des droits d'accès. Selon un mode de réalisation préféré, un processus d'agent indépendant autonome exécuté au niveau d'un point d'utilisation, tel qu'un processus de fond dans un noyau de système d'exploitation client, interrompt les demandes d'accès aux ressources. Le processus d'agent détecte, filtre et regroupe des événements système de niveau bas. Un moteur de politique analyse les séquences d'événements regroupés afin de déterminer le moment convenable pour le chiffrement.

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