Recording medium, initialize method for recording medium, method for encryption on recording medium, encryption equipment, decryption equipment, and audio/visual/data equipment
First Claim
Patent Images
1. A recording medium comprising:
- an administration area readable by a reading device but inaccessible to a user; and
a data area readable by said reading device and arbitrarily accessible to said user, disc identification information for encryption being recorded in said administration area.
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Accused Products
Abstract
A predetermined initialization is made on a CD-R disc or a CD-RW disc using an existing formatting method to a specific disc on which recorded are a media number forming an encryption key based on a combination of a decimal six-digit disc ID, a decimal thirteen-digit MCN and a decimal five-digit ISRC serial number and encrypted data obtained by the encryption using this media number. This allows a user to make the copy of copyrighted data such as music, movie and computer program data only once, but inhibits the secondary copy from this copy disc to another disc, which achieves the protection of the copyrighted data.
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Citations
22 Claims
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1. A recording medium comprising:
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an administration area readable by a reading device but inaccessible to a user; and
a data area readable by said reading device and arbitrarily accessible to said user, disc identification information for encryption being recorded in said administration area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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- 10. A method of initializing a recording medium having an administration area readable by a reading device but inaccessible to a user and a data area readable by said reading device and arbitrarily accessible to said user, disc identification information for encryption being recorded in said administration area.
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13. An encryption method on a recording medium having an administration area readable by a reading device but inaccessible to a user and a data area readable by said reading device and arbitrarily accessible to said user, characterized by comprising an encryption step of, after initialization is made by recording disc identification information for encryption in said administration area, encrypting media information including one of audio, visual and data information by an encryption key using at least said disc identification information to record said media information as encrypted media information in said data area for producing a specific recording medium.
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19. An encryption equipment comprising:
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readout means made to read out at least disc identification information from a recording medium having an administration area readable by a reading device but inaccessible to a user and a data area readable by said reading device and arbitrarily accessible to said user, with said disc identification information for encryption being recorded in said administration area;
encrypted media information generating means made to encrypt media information including one of audio, visual and data information by means of an encryption key using at least said disc identification information for outputting said media information as encrypted media information to said data area; and
encrypted media information preserving means made to preserve said encrypted media information in said data area of said recording medium having the same disc identification information.
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20. A decryption equipment comprising:
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second readout means made to read out at least disc identification information from a recording medium having an administration area readable by a reading device but inaccessible to a user and a data area readable by said reading device and arbitrarily accessible to said user, with said disc identification information for encryption being recorded in said administration area and encrypted information being recorded in said data area;
second encryption key producing means for producing a second encryption key from at least said disc identification information; and
decryption means made to decrypt said encrypted information through the use of said second encryption key for playing back media information including one of audio, visual and data information.
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21. An audio/visual/data equipment comprising:
readout means made to read out at least disc identification information from a recording medium having an administration area readable by a reading device but inaccessible to a user and a data area readable by said reading device and arbitrarily accessible to said user, with said disc identification information for encryption being recorded in said administration area;
encrypted media information generating means made to encrypt media information including one of audio, visual and data information by means of an encryption key using at least said disc identification information for outputting said media information as encrypted media information; and
encrypted media information preserving means made to preserve said encrypted media information in said data area.
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22. An audio/visual/data equipment comprising:
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second readout means made to read out at least disc identification information from a recording medium having an administration area readable by a reading device but inaccessible to a user and a data area readable by said reading device and arbitrarily accessible to said user, with said disc identification information for encryption being recorded in said administration area and encrypted information being recorded in said data area;
second encryption key producing means for producing a second encryption key from at least said disc identification information; and
decryption means made to decrypt said encrypted information through the use of said second encryption key for playing back media information including one of audio, visual and data information.
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Specification