Nippon Hoso' Kyokai

Nippon Telegraph and Telephone Corporation

Syunji Sunasaki

Yusei Nishimoto

Tomokazu Yamada

Arisa Fujii

Kiyohiko Ishikawa

Katsuhiko Kawazoe

Yuko Konya

Masahito Kawamori

Ganji Eto

Koichi Ishikawa

Satoshi Fujitsu

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

A low cost scramble key management apparatus which enables to manage a scramble key based on individual contract information and to ensure security in narrow band broadcasting. The scramble key management apparatusincludes an ECM decoding unitfor decoding an ECM in which a scramble key and individual contract information are encrypted. The individual contract information includes contract information indicating contract statuses of a plurality of content receivers, . . . which is arranged based on receiver IDs for identifying each of the content receivers. The scramble key management apparatusincludes a contract information obtaining unitfor obtaining the contract information of the content receiverassociated with the receiver ID from the individual contract information and a contract status determining unitfor determining the contract status and outputting the scramble key to a content decoderif the contract status is under contract.

Scramble key management unit, scramble key management information transmitting unit, method for scramble key output management, scramble key management program, license information management unit, license management information transmitting unit, method for license information output management, and license information management program

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Shibuya-ku, Japan

Syunji Sunasaki