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Encrypted content and decryption key providing system

A technology for encrypting keys and content data, which is applied in the direction of analog confidentiality/charging systems, transmission systems, selective content distribution, etc., and can solve the problems of losing the meaning of publicity and being outdated

Inactive Publication Date: 2008-08-13
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the information transmission system of Patent Document 1, since CM information and program information are transmitted at the same time, if the period from recording to reproduction of CM information and program information is long, the CM information becomes outdated and loses the significance of publicity

Method used

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  • Encrypted content and decryption key providing system
  • Encrypted content and decryption key providing system
  • Encrypted content and decryption key providing system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0044] Hereinafter, the content management system of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a content management system according to the first embodiment of the present invention.

[0045] The content management system shown in Fig. 1 comprises: the content providing server 1 that provides content data, the CM providing server 2 that provides advertisement message (hereinafter referred to as " CM ") data, and reproducing the content data provided by content providing server 1 and by The CM provides the content reproduction device 3 of the CM data provided by the server 2 . In addition, in this specification, content data is suitably abbreviated and expressed as "content", and CM data is suitably abbreviated as "CM" and expressed.

[0046] The content providing server 1 is, for example, a server operated by a TV station, and provides content such as programs broadcast by the TV station. Th...

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PUM

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Abstract

Not only is it possible to let the viewers watch information that an information provider wants watched by the viewers in a reliable manner, but it is also possible to provide the viewers with information that the information provider desires. A content providing server 1 appends an encryption key ID of an encryption key used when encrypting content data to the content data encrypted using the encryption key and transmits the content data appended with the encryption key ID to a content reproduction device 3, while it transmits the encryption key to a CM providing server 2. The CM providing server 2 embeds the encryption key into CM data and transmits the CM data in which is embedded the encryption key corresponding to the encryption key ID that has been received from the content reproduction device 3 to the content reproduction device 3. The content reproduction device 3 transmits the encryption key ID to the CM providing server 2 and reproduces the CM data received from the CM providing server 2 to decrypt the content data using the encryption key embedded in the CM data, after which it reproduces the decrypted content data.

Description

technical field [0001] The present invention relates to an information management system and an information management method, wherein a first information providing server providing first information, a second information providing server providing second information different from the first information, and a second information providing server providing second information different from the first information are communicably connected to each other, and the information reproduced by the first information providing server is mutually communicatively connected. An apparatus for reproducing first information provided by an information providing server and second information provided by a second information providing server. [0002] In addition, the present invention also relates to an information providing server and an information providing method for providing information, a reproduction device, a reproduction method, and a reproduction program for reproducing information, a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/16G06Q30/00G09C5/00H04L9/08H04N7/167
CPCH04N21/812H04L63/06H04L9/08H04L2209/60H04L63/0428H04N21/4405H04N21/44204H04N21/8355H04N21/4623H04N21/4181H04N7/1675G06Q30/02
Inventor 山冈胜东海林卫佐藤孝广大岛光昭田中伸一
Owner PANASONIC CORP