Device for encoding encrypted information on an optical disk
First Claim
1. An information recording device for recording information on an optical disk comprising a first recording area and a second recording area, said device comprising:
- means for recording encrypted information using a first modulation method into a first recording area of such an optical disk;
means for reading auxiliary information including disk identification information recorded by a second modulation method in a second recording area of the optical disk;
means for detecting the presence of auxiliary information;
means for encrypting information using at least both a cipher key and disk identification information unique to the optical disk, into such encrypted information unique to the same optical disk; and
means for permitting recording of such encrypted information by said means for recording after confirming the presence of said auxiliary information.
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Abstract
A device for recording information on an optical disk having first and second recording areas, which device can record information into the first recording area, using a first modulation method; read disk identification information recorded by a second modulation method in the second recording area; detect auxiliary information indicating the presence of disk identification information; encrypt information using both a cipher key and the disk identification information unique to the optical disk; and permit recording of encrypted information after confirming the presence of the disk identification information.
28 Citations
6 Claims
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1. An information recording device for recording information on an optical disk comprising a first recording area and a second recording area, said device comprising:
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means for recording encrypted information using a first modulation method into a first recording area of such an optical disk;
means for reading auxiliary information including disk identification information recorded by a second modulation method in a second recording area of the optical disk;
means for detecting the presence of auxiliary information;
means for encrypting information using at least both a cipher key and disk identification information unique to the optical disk, into such encrypted information unique to the same optical disk; and
means for permitting recording of such encrypted information by said means for recording after confirming the presence of said auxiliary information. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification