Nippon Hoso' Kyokai

Nec Corporation

Akitsugu Baba

Jun Goto

Hiroshi Fujisawa

Yasuaki Kanatsugu

Yusei Nishimoto

Hiroyuki Hamada

Tatsuya Kurioka

Kiyohiko Ishikawa

Kinji Matsumura

Shigeaki Mitsuya

Masaru Takechi

Haruyuki Nakamura

An application management server includes: a terminal management table storage unit configured to store terminal device identification data for identifying a terminal device and information indicating whether or not transmission of notification data is necessary while correlating the terminal device identification data with the information; a registration request reception unit configured to receive from the terminal device, a registration request for registering transmission of notification data, and update the terminal management table storage unit based on the registration request; a release request reception unit configured to receive from the terminal device, a release request for releasing transmission of notification data, and update the terminal management table storage unit based on the release request; a via-broadcasting notification transmission unit configured to perform a process of including notification data in a broadcasting signal and transmitting the notification data; and a via-communication notification transmission unit configured to perform a process of referring to the terminal management table storage unit and transmitting the notification data to the terminal device.

Cooperative communication/broadcasting system, application management server, receiver, reception method for receiver, and application management method for application management server

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

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Tokyo, Japan

Akitsugu Baba