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AssigneePanasonic Corporation
InventorsMasayuki Kozuka, Takahiro Yamaguchi, Toshihisa Nakano, Kaoru Murase, Motoji Ohmori, Makoto Morise, Masataka Minami
Estimating the term…
Provided is a revocation list generation device that can suppress an increase in the amount of data of a revocation list. A revocation list generation device that generates a revocation list includes an acquisition unit that acquires, for a content, a revocation identifier identifying a revoked public key certificate allocated to an apparatus related to use of the content, a revocation list generation unit that generates a revocation list including the acquired revocation identifier associated with the content, and an output unit that outputs the revocation list.
A revocation list generation device for generating a revocation list, the revocation list generation device comprising:
A content management system comprising a revocation list generation device, a recording medium device, and an apparatus into which the recording medium device is loaded,
A revocation list generation method used in a revocation list generation device for generating a revocation list, the revocation list generation method comprising:
A non-transitory computer-readable recording medium having recorded thereon a computer program for revocation list generation used in a revocation list generation device for generating a revocation list, the computer program causing the revocation list generated device to perform a method comprising:
An integrated circuit implementing a revocation list generation device for generating a revocation list, the integrated circuit comprising:
Dependencies are inferred from the claim text.
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Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords: revocation or update of secret…
Involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements: using…
For supporting key management in a packet data network: for key distribution, e.g. centrally by trusted party
Additional details relating to network architectures or network communication protocols for network security covered by H04L63/00: applying…
About 5 years 6 months of term left · ends 17 Apr 2032 (estimated)
The present invention relates to technology for generating a revocation list that can identify revoked public key certificates.
In recent years, as digital technology rapidly spreads, systems have emerged for distributing digitalized content (hereinafter simply referred to as content) either by recording media, such as optical discs, or over a network.
One characteristic of such content is that quality does not degrade despite duplication. In order to protect the copyright of such content, it is necessary to prevent the holder of the content from making unauthorized copies. Therefore, within the system for distributing content, a transmission device that transmits the content and a playback device that plays back the received content each confirm that the other device is a legitimate device that protects copyright. Only when such confirmation is successful does the transmission device transmit the content to the playback device. In this way, the devices that use the content can be restricted, thus allowing for protection of the copyright on the content.
FIG. 1 is a configuration diagram showing an overall configuration of a content management system 10g according to Embodiment 1.
FIG. 2 is a configuration diagram showing an overall configuration of a content management system 10a according to Embodiment 2.
FIG. 3 is a block diagram showing the structure of a key issuing device 200.
An aspect of the present invention is a revocation list generation device for generating a revocation list, comprising an acquisition unit configured to acquire, for a content, a revocation identifier identifying a revoked public key certificate allocated to an apparatus related to use of the content; a revocation list generation unit configured to generate a revocation list including the acquired revocation identifier associated with the content; and an output unit configured to output the revocation list.
The acquisition unit may acquire the revocation identifier identifying the revoked public key certificate allocated to a playback device as the apparatus, the playback device being capable of playing back the content.
The revocation list generation device may be a content production device for producing a content by editing material, and the output unit may output the produced content along with the revocation list.