METHOD FOR PROTECTING AND MANAGING DIGITAL CONTENT, AND SYSTEM USING THE SAME

PROBLEM TO BE SOLVED: To provide a method and a system for protecting digital content, and to provide its copyright. SOLUTION: A user receives an encrypted content and an encrypted decryption key that can decrypt the encrypted content. A key is generated, based on system information that indicates s...

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Bibliographische Detailangaben
Hauptverfasser:	KIM JONWON, NAM-YONG LEE, CHOI JONG-UK, LEE WON HA
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING CALCULATING CODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHERPURPOSES INVOLVING THE NEED FOR SECRECY COMPUTING COUNTING CRYPTOGRAPHY DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES DISPLAY EDUCATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS SEALS SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method and a system for protecting digital content, and to provide its copyright. SOLUTION: A user receives an encrypted content and an encrypted decryption key that can decrypt the encrypted content. A key is generated, based on system information that indicates system characteristics specific to individual user, and the encrypted content decryption key is decrypted using the key. The decryption for the encrypted content decryption key will be performed, only when a key, which is generated by extracting user system information for the content to be used by the user, is the same as the decryption key for the encrypted content decryption key. If the content decryption key is decrypted, the encrypted content is decrypted by using the decrypted content decryption key. By having only the reproduction and usage of contents permitted in the system, unauthorized usage and distribution of contents can be prevented. COPYRIGHT: (C)2007,JPO&INPIT