| 摘要 |
The present invention relates to a recording system and method, a recording apparatus and method, an input device and method, a playback system and method, a playback apparatus and method, a recording medium, and a program in which content can be flexibly protected according to whether or not the content should be protected. When mutual authentication is conducted with an AV board 112 by a mutual authentication unit 121 and when the content input into the mutual authentication unit 121 is encrypted with a common key, an input/output controller 122 determines that the content to be input via a bus 113 is to be protected on the bus 113 . The input/output controller 122 then controls a recording/playback processor 123 to generate protection information "0", indicating that the content is to be protected on the bus 113 , and records the generated protection information on an optical disc 141 together with the content. The present invention can be applied to an optical-disc recording/playback apparatus.
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