Sony Corporation

Seiichi Adachi

Hiroshi Ikeda

Yoji Kawamoto

Yutaka Nagao

Mitsuhiro Nakamura

Motomasa Futagami

A management apparatus includes a registering unit configured to issue a first key corresponding to a first service in response to a request for registration with the first service from a first information processing apparatus; a storage unit configured to store an apparatus ID of the first information processing apparatus, the first key, and a second key corresponding to a second service while associating the apparatus ID, the first key, and the second key with each other; and a composite license issuing unit configured to issue a composite license including a first license and a second license, the first license including first encrypted data, which is a content key that is used to decrypt the encrypted content and that is encrypted with the first key, and the second license including second encrypted data, which is the content key that is encrypted with the second key.

Management apparatus, information processing apparatus, management method, and information processing method

A content information providing system is disclosed which can protect the copyrights of contents while permitting users who do not purchase the contents to utilize the contents. A content information providing server includes a user information storage section for storing a user key unique to each user, a content key storage section for storing content keys unique to individual contents, a recommendation section for selecting a content to be recommended to the user, a content key encryption section for encrypting the selected content key with a user key of the user of a target of the recommendation, and a content information sender section for transmitting the encrypted content key to a content reproduction apparatus used by the user. The content reproduction apparatus includes a content information receiver section for receiving the content key, and a content key decryption section for decrypting the encrypted content key.

Content information providing system, content information providing server, content reproduction apparatus, content information providing method, content reproduction method and computer program

An information receiving apparatus purchasing content through a service transmits a license-issuing request including information about a client type representing the type of the information receiving apparatus to an information transmitting apparatus. In the information transmitting apparatus, a license-issuing request processing function part analyzes data on the license-issuing request, and a request-sorting function part selects, in accordance with information about the combination of a profile ID representing the type of the service and the client type, a license-issuing request conversion function part that performs processing corresponding to the combination. The selected license-issuing request conversion function part converts the data into data corresponding to performance of the information receiving apparatus in accordance with the terms of use for using the content and the profile ID. A license-issuing function part creates a license having a predetermined format using the data.

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Kanagawa, Japan

Seiichi Adachi