SYSTEM AND METHOD FOR AUTHORIZED COMPRESSION OF DIGITIZED MUSIC
First Claim
1. A computer-based system for inhibiting unauthorized recording of digitized music, comprising:
- a cryptography module including logic executable by a provider computer, the logic including, for at least a segment of the music, obtaining an authorized digital signature, and then associating the authorized digital signature with the music; and
a consumer module associated with a consumer music player and executable thereby to undertake logic including processing at least the segment of the music to obtain a test digital signature, and, only if the test digital signature matches the authorized digital signature, permitting at least one of;
compression of the music, and recording the music, on the consumer music player;
2 Assignments
0 Petitions
Accused Products
Abstract
A system and method for enabling authorized music from a CD or DVD to be compressed by a user for the user'"'"'s own use, but to prevent the recompression of unauthorized music from, e.g., the Internet, includes hashing the music during recording with a cryptographic hash, and then signing the hash with a digital signature derived from the hash. Subsequent unauthorized compression and recompression will destroy the digital signature. Accordingly, music to be recorded is hashed to obtain a test digital signature and if, after hashing, the test digital signature matches the digital signature accompanying the music, compression and recording are allowed to proceed.
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Citations
21 Claims
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1. A computer-based system for inhibiting unauthorized recording of digitized music, comprising:
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a cryptography module including logic executable by a provider computer, the logic including, for at least a segment of the music, obtaining an authorized digital signature, and then associating the authorized digital signature with the music; and
a consumer module associated with a consumer music player and executable thereby to undertake logic including processing at least the segment of the music to obtain a test digital signature, and, only if the test digital signature matches the authorized digital signature, permitting at least one of;
compression of the music, and recording the music, on the consumer music player;
- View Dependent Claims (2, 3, 4, 5, 6, 19)
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7. A computer program storage device including a program of instructions for determining whether a request to compress and record digitized music should be honored, the program of instructions including:
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computer readable code means for processing at least one segment of the music to obtain a test digital signature;
computer readable code means for receiving an authorized digital signature associated with the music; and
computer readable code means for permitting compression and recording of the music only if at least the test digital signature matches the authorized digital signature. - View Dependent Claims (8)
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9. A computer program storage device including a program of instructions for associating digitized music with at least digital signature derived from at least a segment of the music, the program of instructions including structure comprising:
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computer readable code means for deriving an authorized digital signature from at least the segment of the music;
computer readable code means for storing the music on a recording medium; and
computer readable code means for storing the authorized digital signature on the recording medium along with the music. - View Dependent Claims (10, 11, 12, 14, 15, 16, 17, 18, 21)
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13. A method for facilitating the compression and storage, on a personal music player, of digitized music received on a disk in an authorized transaction, comprising the acts of:
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recording the music on the disk along with at least one authorized digital signature derived from the music;
receiving the disk;
engaging the disk with a personal music player compression device;
deriving at least one test digital signature from the music; and
compressing the music and recording the music on the personal music player only if the test digital signature matches the authorized digital signature.
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Specification