Mutual authentication is performed by using first and second authentication key data between a first data processing device and a second data processing device. When the mutual authentication is succeeded, the first data processing device uses encryption key data for encrypting predetermined data and...http://www.google.fr/patents/US7716477?utm_source=gb-gplus-shareBrevet US7716477 - Data processing method, program of the same, and device of the same
Data processing method, program of the same, and device of the same
