RECORDING MEDIUM, INFORMATION PROCESSING DEVICE, CONTENT DISTRIBUTION SERVER, METHOD, PROGRAM, AND ITS RECORDING MEDIUM

To provide a technique that ensures detection of alternation, if any, of management information stored on a data storage and verifies the validity of the data storage. In an information processing system 20 for use in verifying the validity of a data storage 10 having a first storage area in which a...

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Bibliographische Detailangaben
Hauptverfasser:	INUI, TSUTOMU, TANAKA, MAKOTO
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	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 INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS SEALS TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	To provide a technique that ensures detection of alternation, if any, of management information stored on a data storage and verifies the validity of the data storage. In an information processing system 20 for use in verifying the validity of a data storage 10 having a first storage area in which an original version of management information is stored and a second storage area in which an encrypted version of the management information is stored, the information processing system 20 comprises a controlling unit (24, 26) adapted to read the original version of the management information and the encrypted version of the management information out of the data storage to control decryption of the read encrypted version of the management information; and a comparing unit (25) adapted to determine whether the original version of the management information and the decrypted management information are in a predetermined relationship with each other and validate the data storage when the determination is affirmative.