RECORDING/REPRODUCING SYSTEM, RECORDING MEDIUM DEVICE, AND RECORDING/REPRODUCING DEVICE

摘要

Provided are memory cards and a recording/reproducing device capable of preventing a memory card maker from doing an unauthorized act of storing an identical media ID into each memory card.  The memory card (100) comprises a media ID-storage module unit (610) and a memory unit (120).  The media-ID storage module unit (610) includes a media-ID storage unit (611) for storing a media ID unique for the memory card and an authentication unit (609) for generating authentication information used for authenticating the validity of the memory card on the basis of the media ID.  The memory unit (120) includes an encrypted content storage unit (122) for storing an encrypted digital content.  The recording/reproducing device (200) comprises: a memory card verification unit (211) for obtaining the authentication information from the memory card (100), verifying the validity of the memory card (100) on the basis of the obtained authentication information, and for inhibiting decryption of the encrypted content or encryption of the content if the verification fails; and a content encryption/decryption unit (209) for encrypting the digital content or decrypting the encrypted digital content if the verification succeeds.