Nippon Hoso' Kyokai

Fujitsu Corporation

Nec Corporation

Nippon Telegraph and Telephone Corporation

Kiyohiko Ishikawa

Arisa Fujii

Jun Goto

Noboru Iwamatsu

Fumio Honda

Hironori Sakakihara

Yusei Nishimoto

Tomokazu Yamada

Tatsuya Kurioka

Katsuhiko Kawazoe

Syunji Sunasaki

Akitsugu Baba

Masahito Kawamori

Ganji Eto

Koichi Ishikawa

Shunji Sunasaki

Yuko Konya

Haruyuki Nakamura

For enabling single sign-on among applications, a linkage ID indicating connection between the authentication apparatusincluding the client function and the server apparatusis shared among a plurality of applications. For that, a SV information management unit Aa of the authentication apparatushaving the client function manages the linkage ID by storing it in a predetermined storing unit. An AP information management unit Ab manages and stores connection information between applications in a predetermined storing unit, wherein the connection information includes an application name corresponding to an application. Then, an AP decision unit determines whether an application name included in a received linkage ID request is registered in the AP information management unit Ab, obtains the linkage ID from the SV information management unit Aa when the application name is registered in the AP information management unit Ab, and returns the linkage ID to a source of the linkage ID request.

Authentication apparatus, authentication method, and authentication program implementing the method

An authentication system includes node devices, wherein a first node device transmits the authentication information thereof to a second node device, the second node device selects third node devices that are requested to verify the validity of the received authentication information, and transmits the authentication information to each of the selected third node devices, the third node device records verification information that is used to verify the validity of the authentication information of the first node device, verifies the validity of the authentication information on the basis of the authentication information and verification information, and transmits the result information to the second node device, and the second node device further derives weighted values indicating the reliability of the each verification of the third node devices and authenticates the first node device on the basis of the each result information and the each weighted value received from the third node devices.

Authentication system, authentication device and recording medium

The present invention provides an access control method of controlling acceptance or rejection of access to content from metadata. The access control method according to the present invention includes a step of producing metadataA for contentA and embedding a digital signatureA of a producer who has produced the metadata as producer information in the produced metadataA, a step of embedding an identifierA indicating which metadata are accessible to the content in license information required to play back the contentA, and an access propriety control step of comparing the digital signatureA with the identifierA to control propriety of access to the contentA from the produced metadataA.

Access control method, access control system, metadata controlling device, and transmitting apparatus

Growing community of inventors

Setagaya-ku, Japan

Kiyohiko Ishikawa