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Content data playback device, update management method, and update management program

A content data and reproduction device technology, applied in the direction of electronic digital data processing, digital data protection, computer security devices, etc., can solve the problems of unrealistic, expensive security chip 510, etc., and achieve the effect of improving coercive power

Active Publication Date: 2013-06-12
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a security chip 510 becomes expensive and impractical

Method used

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  • Content data playback device, update management method, and update management program
  • Content data playback device, update management method, and update management program
  • Content data playback device, update management method, and update management program

Examples

Experimental program
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Embodiment Construction

[0046] Embodiments of the present invention will be described below based on the drawings. figure 2 It is a diagram showing an example of the functional configuration of the content reproduction terminal in the embodiment of the present invention.

[0047] The content reproduction terminal 10 is an information processing device (an example of a content reproduction device) that receives content data via a network and reproduces the content data. Examples of the content playback terminal 10 include PC (Personal Computer), IPTV (Internet Protocol Television), STB (Set Top Box), various portable terminals equipped with portable music players, electronic book playback devices, etc. .

[0048]In this figure, a content reproduction terminal 10 has a security chip 11 . The security chip 11 is, for example, an LSI conforming to TPM (Trusted Platform Module) which is a standard determined by TCG (Trusted Computing Group). Therefore, it is difficult to refer to the information recor...

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PUM

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Abstract

The present invention is a content data playback device having a security chip, wherein the security chip has: storage means for storing firmware data containing a firmware program; and firmware update management means which, according to input of an acquisition request for a content key or a decoding request for content data for the security chip, assesses the necessity for executing update processing for firmware data on the basis of a comparison between deadline information which has been set for the firmware data and time information which has been received through a network, and if execution of the update processing is necessary, rejects the request. Therein, the firmware program causes the security chip to function as content key acquisition control means for acquiring the content key for decoding the content data through the network, and decoding means for decoding the content data using the content key.

Description

technical field [0001] The present invention relates to a content data reproducing device, an update management method, and an update management program that continuously update firmware. Background technique [0002] Conventionally, there have been terminals that receive and reproduce content data such as music and video via a line (hereinafter referred to as “content reproduction terminal”). Examples of the content reproduction terminal include PC (Personal Computer), IPTV (Internet Protocol Television), STB (Set Top Box), various portable terminals equipped with a portable music player, and the like. [0003] In order to prevent unauthorized use of content data by the content playback terminal, it is desirable that the firmware of the content playback terminal be regularly updated. This is because the firmware includes a key for secure communication in order to securely obtain a decryption key for content. That is, in the case of secure communication based on the same k...

Claims

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Application Information

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IPC IPC(8): G06F21/62G06F21/10
CPCG06F21/572G06F2221/2137G06F21/10G06F8/65
Inventor 丸山秀史
Owner FUJITSU LTD