France Telecom

Orange

Sylvie Camus

Dimitri Mouton

Laurent Frisch

David Arditi

Julie Loc'H

Sandrine Bailloux

At least one expired decryption key intended to be used for asymmetrical decryption of encrypted data is recovered in a terminal after generation of a cryptographic encryption key/decryption key pair stored in a cryptographic medium such as a microchip card. The expired decryption key is stored in a database accessible to a user of the terminal and encrypted beforehand as a function of the new generated encryption key. In the terminal connected to the cryptographic medium, the encrypted expired encryption key is decrypted as a function of the decryption key stored in the cryptographic medium so that the encrypted data is decrypted as a function of the thus decrypted expired decryption key.

Recovery of expired decryption keys

The cryptographic resources are supplied by at least one cryptographic source having a specific access interface. The application is presented with a mutualized interface substantially independent of the cryptographic sources and of their respective access interfaces. A translation module is placed between the mutualized interface and each interface for accessing a cryptographic source to provide access to the cryptographic resources from the application via the mutualized interface.

Method of controlling access to cryptographic resources

Growing community of inventors

Palaiseau, France

Sylvie Camus