PROTECTION D'ACCÈS POUR DES DONNÉES ÉTRANGÈRES DANS LA MÉMOIRE NON VOLATILE D'UN JETON

摘要

The invention relates to a method for access protection for external data in the non-volatile memory of a token in relation to an external interface of the token, comprising: carrying out a protocol between the token and an external data host computer for mutual authentication via the external interface; transmitting a cryptographic sector identifier from the one external data host computer to the token via the external interface; generating a temporary key from the transmitted cryptographic sector identifier via the token; transmitting external data from the one external data host computer via the external interface for storage in the non-volatile memory; and encrypting the external data using the temporary key via the token, and storing the encrypted external data in the non-volatile memory.