| 摘要 |
An authentic media protection system is described. Every recorded media includes a digital signature, a list of known counterfeit media identifiers, and counterfeit media response information. The digital signature is a unique encrypted combination of a recorded media serial number and samples of substantive information recorded on the media. The playback unit performs a series of authenticating steps before playing or reading recorded media. The playback unit independently verifies the encrypted digital signature to detect forgeries. The playback unit stores a recorded media identifier for each recorded media that is played in a cumulative list. This cumulative list is compared with the lists of known counterfeit media stored on each recorded media to determine whether the playback unit has played a counterfeit media. If the playback unit determines it has played a counterfeit media then it executes a counterfeit media response routine. Playback units can also store a cumulative list of known counterfeit media that it reads from each recorded media it plays. It then can check the authenticity of each new recorded media based on the internally stored list of known counterfeit media. Upon detection of counterfeit media a counterfeit response routine can be executed ranging in severity from merely displaying a warning message to shutting down the playback unit and requiring an authorized technician to unlock the unit.
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