Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Reexamination Certificate
1998-12-15
2001-02-13
Edun, Muhammad (Department: 2753)
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
C369S053130, C369S047360
Reexamination Certificate
active
06188659
ABSTRACT:
FIELD OF THE INVENTION
The invention relates in general to the storage of information on a recordable CD, CD-R or CD-RW and in particular to storage of audio information. Specifically, the relates to a method of insuring the uniqueness of an originally recorded CD, but may also be applied to DVD-R, DVD-RAM as well as stamped CD and DVD.
BACKGROUND OF THE INVENTION
The recording industry is moving toward a new method of distributing content which will allow for creation of original custom CD's either via mail order, from a kiosk located in a retail outlet or by electronic distribution. As a result of this new form of distribution, concerns have arisen within the recording industry that an original custom CD will be replicated by the purchaser and distributed for profit without proper recognition of the original content providers intellectual property rights.
In view of the above, it is an object of the invention to provide a method of proving that a CD is an authorized original and to identify illegal copies of an authorized original.
SUMMARY OF THE INVENTION
The invention provides a method of proving that a CD is an authorized original by utilizing a unique catalog code that is stored in a sub channel data stream on the CD that is derived using digital signature techniques. The inputs for the unique catalog code are derived from a digital signature algorithm and include, in the case of audio CD, each song's ISRC (International Standard Recording Code) number, a bar code or unique identifier of the CD and the audio data content. The ISRC number is assigned by the Recording Industry Association of America (RIAA) for each individual song. To verify that the CD is not a copy, the original digital signature algorithm used at the time of recording to create the unique catalog code is applied to the audio data and ISRC codes recorded on the disc to derive a catalog code. An authorized original CD will have the same catalog code value stored in the subchannel as the catalog code derived from the digital signature algorithm. If the catalog codes do not match, the disc is determined to be an illegal copy.
More specifically, the invention provides a method for insuring uniqueness of a recorded disc, wherein data and a data identifier number, which corresponds to the data, to be recorded on a recording disc is provided, the data is randomly sampled utilizing a sampling function to generate a sampling vector, wherein the sampling function utilizes a unique disc identifier provided on the recording disc to define the random sampling, the sampling vector is concatenated with the data identifier number to form a message, the message is hashed to generate a hash value using a hash function, the hash value is signed with a private key using a signing function to generate a signature, and the data, data identifier number and signature are recorded on the recording disc.
Verification is performed by randomly sampling the data recorded on a recording disc utilizing a verification sampling function to generate a verification sampling vector, wherein the verification sampling function utilizes a unique disc identifier provided on the recording disc to define the random sampling, concatenating the verification sampling vector with the unique disc identifier to form a verification message, hashing the verification message to generate a verification hash value using a verification hashing function, generating a verification value using a verification function that utilizes the verification hash value and the signature recorded on the recording disc, wherein the recording disc is determined to be legitimate if the verification value is equal to the signature.
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Bruce Schneier, Applied Cyptography, 2nd ed., John Wiley & Sons, 1996.
Proposed Federal Information Processing Standard for Secure Hash Standard, Federal Register, vol. 57, No. 21, Jan. 31, 1992, pp. 3747-3749.
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Gustavus J. Simmons, Contemporary Cryptology, The Science of Information Integrity, IEEE Press, 1991, pp. 325-378.
Diffie et al, New Directions in Cryptography, IEEE Transactions on Information Theory, vol. IT-22, No. 6, Nov. 1976, pp. 644-654.
Mueller William J.
Reisch Robert V.
Vasic Bane V.
Eastman Kodak Company
Edun Muhammad
Owens Raymond L.
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