Copyright protection system, reproduction device, and reproduction method
A playback device and external device technology, applied in transmission systems, digital transmission systems, secure communication devices, etc., can solve the problem of malicious use of audio-visual records
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[0039] 1.1 Structure of Copyright Protection System
[0040] copyright protection systems such as figure 1 Shown is constituted by an authentication station terminal device 101 , a content provider terminal device 102 , a recording medium 103 and a reproduction device 104 .
[0041] The authentication station terminal device 101 provides the content provider terminal device 102 with a pair of a certificate and a private key, and provides a white list signed by the authentication station in response to a request from the content provider terminal device 102 . In addition, the authentication station terminal device 101 provides the playback device 104 with a public key held by the authentication station itself (the authentication station public key) and an invalidation list signed by the authentication station. Details about the whitelist will be explained later.
[0042] Based on a request from the playback device 104, the content provider terminal device 102 provides the pla...
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