Terminal apparatus capable of using a recording medium with a copyright protecting function

摘要

Binding information used to encrypt a first encryption key for encrypting content is encrypted on the basis of a second encryption key and the encrypted binding information is stored in a recording medium. At the same time, the second encryption key is encrypted on the basis of first unique information specifying the recording medium and the encrypted second encryption key is stored in the recording medium. On the other hand, when the encrypted content is reproduced from the recording medium, the encrypted second encryption key is decrypted on the basis of the first unique information. On the basis of the decrypted second encryption key, the encrypted binding information is decrypted. Using the decrypted binding information or the first encryption key decrypted on the basis of the binding information, the encrypted content is decrypted.