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Content data reproduction device and update management method

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

Active Publication Date: 2016-11-30
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 reproduction device and update management method
  • Content data reproduction device and update management method
  • Content data reproduction device and update management method

Examples

Experimental program
Comparison scheme
Effect test

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. As an example of the content playback terminal 10, PC (Personal Computer), IPTV (Internet Protocol Television), STB (Set Top Box), or 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 reco...

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Abstract

In a content data reproducing device having a security chip, the security chip has: a storage unit that stores firmware data including a firmware program; and a firmware update management unit that responds to a content key acquisition request or a content data decryption request. For the input of the above-mentioned security chip, by comparing the time limit information set by the above-mentioned firmware data with the time information received via the network, it is determined whether the update process of the above-mentioned firmware data needs to be performed, and the above-mentioned request is rejected when the above-mentioned update process needs to be performed; The firmware program causes the security chip to function as content key acquisition control means for acquiring a content key for decrypting content data via a network, and a decryption means for decrypting 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 content playback terminals include PC (Personal Computer), IPTV (Internet Protocol Television), STB (Set Top Box), and various portable terminals equipped with portable music players. [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 key for a long peri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/62
Inventor 丸山秀史
Owner FUJITSU LTD