METHOD AND SYSTEM FOR DIGITAL INFORMATION COMMUNICATION

PURPOSE:To provide a method and a system for digital information communication which protect the copy right by enabling a specific regular user group consisting of plural members to freely make a copy for backup or use information in terminals other than the reception terminal with respect to charge...

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Bibliographic Details
Main Authors KANDA MASASUKI, YAMANAKA KIYOSHI
Format Patent
LanguageEnglish
Published 10.11.1995
Edition6
Subjects
ADVERTISING
CALCULATING
CODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHERPURPOSES INVOLVING THE NEED FOR SECRECY
COMPUTING
COUNTING
CRYPTOGRAPHY
DISPLAY
EDUCATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
SEALS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:PURPOSE:To provide a method and a system for digital information communication which protect the copy right by enabling a specific regular user group consisting of plural members to freely make a copy for backup or use information in terminals other than the reception terminal with respect to chargeable digital information received and purchased by communication use and preventing the illegal use of groups other than the regular user group for the purpose of protecting the right of a copyright holder and an information presenter. CONSTITUTION:A card 2 which has a security information storage part 21 where the user identification number different by cards, is provided only one group secret key set to a group in common, etc., are stored, and the card 2 and a terminal equipment 3 are connected, and the user identification number stored in the card 2 is transmitted from the terminal equipment 3 to an information center device 1 to request the information, and the received information main body is enciphered with the group secret key and is stored in the terminal equipment 3, and the information main body is deciphered by the group secret key when being used.
Bibliography:Application Number: JP19940086837