Electronic data protection system

Details Electronic data protection system Electronic data protection system

1993-03-15

1995-02-21

Barron, Jr., Gilberto

Cryptography

Cryptanalysis

380 25, H04L 932

Patent

active

053923510

ABSTRACT:
An electronic data protection system for protecting electronic data from illegal copying by a third party, includes: a storage medium for storing an encrypted electronic data, a medium number and encrypted permission information; a vendor computer having a personal key generating unit for generating a medium key based on the medium number, an electronic data decrypting key, and an encrypting unit for encrypting the electronic data decrypting key based on the medium key to generate the encrypted permission information; and a user computer having a personal key generating unit for generating a medium key based on the medium number, a decrypting unit for decrypting the encrypted permission information based on the medium key to generate the electronic data decrypting key which is the same as the electronic data decrypting key of the vendor computer, and a decrypting unit for decrypting the encrypted electronic data based on the electronic data decrypting key to generate a plain text electronic data.

REFERENCES:
patent: 4683553 (1987-07-01), Mollier
patent: 4757534 (1988-07-01), Matyas et al.
patent: 4850017 (1989-07-01), Matyas, Jr. et al.
patent: 5010571 (1991-04-01), Katznelson
patent: 5058162 (1991-10-01), Santon et al.
patent: 5065429 (1991-11-01), Lang
Computer vol. 17, No. 4, (Apr. 1984) Long Beach, Calif., USA; Combatting Software Piracy by Encryption and Key Management.

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