RECOVERY OF OBSOLETE DECRYPTION KEYS

摘要

The inventive method consists in recovering at least one obsolete decryption key (S_n) for decrypting asymmetrically encrypted data items at a terminal (T) after generating a cryptographic encryption/decryption key pair stored in a cryptographic support such as a smart card (CP), in recording the obsolete decryption key, which is pre-encrypted according to a new generated encryption key, in a database (BL) accessible for a terminal user, in encrypting and decrypting said obsolete encryption key in the terminal connected to the cryptographic support according to the decryption key recorded in the cryptographic support in such a way that encrypted data items are decrypted according to the thus decrypted obsolete decryption key.