A terminal device 500 that is connected to a key distribution device 400 via a network, and in which a recording medium device 600 is mounted, the key distribution device 400 being for distributing a title key necessary for use of content, the recording medium device 600 being for storing therein the content and the title key. The recording medium device 600 and the key distribution device 400 perform mutual authentication and share shared keys that are identical to each other. The terminal device 500 comprises: a reception unit that receives an encrypted title key from the key distribution device 400, the encrypted title key being the title key encrypted with the shared key of the key distribution device 400; and a transfer unit 513 that transmits the encrypted title key to the recording medium device 600. Upon completion of the mutual authentication between the recording medium device 600 and the key distribution device 400, the reception unit and the transfer unit 513 refrain from any involvement with communication data except reception and transmission thereof, the communication data being exchanged between the recording medium device 600 and the key distribution device 400 with use of the shared keys.