System for decryption and re-encryption of files

H - Electricity – 04 – L

Patent

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Details

H04L 9/00 (2006.01) G06F 1/00 (2006.01) G06F 12/14 (2006.01) G06F 21/00 (2006.01)

Patent

CA 2242876

A machine system (100) for automatic decryption of confidential file data on a per-use basis and automatic later elimination of the decrypted data by scorching and/or re-encrypting is disclosed. The following features are provided for secure and automatic recryption: (1) use of file-exclusion lists; (2) use of application-program exclusion lists; (3) decrypting as needed in response to intercepted file-OPEN requests; (4) encrypting as needed in response to intercepted file-CLOSE requests; (5) delaying post-CLOSE encryption.

L'invention porte sur un système machine (100) permettant le décryptage automatique, en cours d'utilisation, de données confidentielles de fichier et l'élimination ultérieure systématique des données décryptées, soit par le feu, soit par re-cryptage. Le procédé aux fins d'un re-cryptage automatique et sécurisé comporte les mécanismes suivants: 1), utilisation de listes d'exclusion de fichiers, 2), utilisation de listes d'exclusion de programmes d'application, 3), décryptage, selon que de besoin, en réponse à des demandes interceptées d'ouverture de fichier, 4), cryptage, selon que de besoin, en réponse à des demandes interceptées de clôture de fichier, 5), report du cryptage d'après clôture.

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