A storage unit 601g of a recording medium device 600g stores a content and a revocation list. The revocation list includes a revocation identifier that is associated with the content and identifies a revoked public key certificate allocated to an apparatus related to use of the content. A controller 602g of the recording medium device 600g is provided with an acquisition unit 621g that acquires, from an apparatus 300g, an acquisition request for the content and an apparatus identifier identifying a public key certificate of the apparatus 300g; a judgment unit 622g that judges whether the apparatus identifier matches a revocation identifier; and a control unit 623g that controls to prohibit output of the content to the apparatus when the apparatus identifier and the revocation identifier match.