Optical disk reading device using both a decipher key and disk identification information for decryption
First Claim
Patent Images
1. An information reproducing device for reading encrypted information from an optical disk comprising a first recording area and a second recording area, said device comprising:
- means for reading encrypted information recorded by a first modulation method in a first recording area of such an optical disk said means including an optical reading head;
means for reading disk identification information recorded by a second modulation method in a second recording area of the same optical disk said means including said optical reading head; and
means for decrypting said encrypted information using at least both a decipher key and disk identification information unique to the optical disk.
0 Assignments
0 Petitions
Accused Products
Abstract
A device for reading encrypted information from an optical disk having first and second recording areas, which device can read encrypted information recorded by a first modulation method in the first recording area, read disk identification information recorded by a second modulation method in the second recording area, and decrypt the encrypted information using both a decipher key and disk identification information unique to the optical disk.
-
Citations
5 Claims
-
1. An information reproducing device for reading encrypted information from an optical disk comprising a first recording area and a second recording area, said device comprising:
-
means for reading encrypted information recorded by a first modulation method in a first recording area of such an optical disk said means including an optical reading head;
means for reading disk identification information recorded by a second modulation method in a second recording area of the same optical disk said means including said optical reading head; and
means for decrypting said encrypted information using at least both a decipher key and disk identification information unique to the optical disk. - View Dependent Claims (2, 3, 4, 5)
-
Specification