Apparatus for data copyright management system
First Claim
1. A data copyright management apparatus, comprising:
- decryption means which decrypts encrypted copyrighted digital data by using a first crypt key; and
encryption means which encrypts said copyrighted digital data thus decrypted, by using a second crypt key.
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Accused Products
Abstract
A data copyright management apparatus for handling data copyrights, and data of digital cash and video conference system is provided. The data copyright management apparatus comprises a CPU, ROM, EEPROM, and RAM. The ROM, EEPROM, and RAM are connected to the CPU bus, and a system bus of a device which utilizes the data can be connected to the CPU bus. A data copyright management system program, cryptographic algorithm, and user information are stored in the ROM, and a first public-key, a first private-key, a second public-key, a second private-key, a first secret-key, a second secret-key, and copyright information are stored in the EEPROM. The data copyright management apparatus may be configured in the form of a monolithic or hybrid IC, a thin IC card, PC card, insertion board, and further, may be incorporated in a computer, television set, set-top box, digital video tape recorder, digital video disk recorder, digital audio tape apparatus, or personal digital assistants, and the like.
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Citations
8 Claims
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1. A data copyright management apparatus, comprising:
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decryption means which decrypts encrypted copyrighted digital data by using a first crypt key; and
encryption means which encrypts said copyrighted digital data thus decrypted, by using a second crypt key. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification