| http://www.w3.org/ns/prov#value | - An optical disk of the first and second preferred embodiments according to the present invention makes it possible to carry out independently (a) an acquisition of the data which needs copyright protection such as movies and music, and (b) an acquisition of the descramble key for decrypting the encryption by recording the encrypted data and the descramble key for decrypting the encryption in diffe
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