Data transmitting system and method, drive unit, access method, data recording medium, recording medium producing apparatus and method

A security apparatus for preventing an information processing apparatus from accessing contents information in a first storage unit, comprising:

• a security module distinct from the first storage unit, the security module comprising:
• a second storage unit configured to store a first revoked unit list;
• a mutual authentication unit configured to execute a mutual authentication protocol with the information processing apparatus;
• a receiving unit configured to receive a second revoked unit list from the information processing apparatus;
• and
• a judging unit configured to judge whether the information processing apparatus is revoked or not based on the first revoked unit list,
• wherein, if the information processing apparatus is revoked, the first revoked unit list is maintained in the second storage unit of the security module, and, if the information processing apparatus is not revoked, the first revoked unit list could be replaced with the second revoked unit list in the second storage unit of the security module, and
• wherein the security module prevents the information processing apparatus from accessing the contents information in the first storage unit when the mutual authentication protocol does not authenticate the information processing apparatus.