Sony Corporation

Kiyoshi Shimizu

Hajime Inoue

Susumu Nagano

Shinji Kakuyama

In a broadcast-program selection history information acquisition apparatus and its method, the totalization side can easily totalize selection history information. To acquire the selection history information of a broadcast program selected out of broadcast programs of a plurality of channels, the selection information of the broadcast program is stored at a predetermined acquisition timing and the selection history information which is composed of a plurality of pieces of selection information stored every plurality of acquisition timings is transmitted to a notification destination at a predetermined transmission timing.

Broadcast-program selection history information acquisition apparatus and its method

An information broadcasting method, a receiver, and an information processing apparatus make it possible to secure safety of information transmission between an information center and information. By encrypting confirmation information with a method making it possible to decipher the confirmation information only in the information terminal that becomes its receiver when an information center transmits the contents of the response signal (S ) transmitted from the information terminal ( ) to the information center ( ) as the confirmation information, it becomes possible to secure safety of information transmission between the information center and information terminal.

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Kanagawa, Japan

Kiyoshi Shimizu