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Recording medium device, terminal device, delivery device, control method, program, and recording medium for program

A terminal device and recording medium technology, applied in data recording, record carrier type, recording signal processing, etc., can solve the problem of inability to flexibly set the terminal device, etc., and achieve the effect of suppressing illegal use

Active Publication Date: 2013-05-08
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Therefore, there is a problem that the content provider cannot flexibly set the information of the invalid terminal device for the content distributed by itself.

Method used

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  • Recording medium device, terminal device, delivery device, control method, program, and recording medium for program
  • Recording medium device, terminal device, delivery device, control method, program, and recording medium for program
  • Recording medium device, terminal device, delivery device, control method, program, and recording medium for program

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0049] Here, a content distribution system 1 as one embodiment of the present invention will be described.

[0050]

[0051] According to the AACS specification, the vendor of the terminal device that holds the leaked device key is allowed to prepare and develop a new device key for correction (maximum 90 days) to release the device key that will be leaked. It takes a long period (4 to 6 months) to reach the MKB after key revocation. Therefore, until MKB is newly released, illegal use of content cannot be suppressed.

[0052] Here, among the contents provided by the content provider, there is what is called an early window (early window) content. Early window content refers to the content of a relatively short period (for example, about 3 months) after the end of the theater release and the start of distribution on DVD and other media in the distribution of movies, etc. Since the acquisition method is limited, the content provided For those with high commercial value. At ...

Embodiment approach 2

[0458]

[0459] The basic overall configuration and figure 1 The content delivery system 1 of the first embodiment shown is the same. The content distribution system of this embodiment includes: a content creation device 100 , a key distribution device 200 , a content distribution device 300 b , a key distribution device 400 b , a terminal device 500 b , a recording medium device 600 , and a signature device 700 .

[0460] In Embodiment 1, when content is recorded, the content distribution device 300 distributes the encrypted content to the terminal device 500, and the key distribution device 400 distributes the calculation title key to the recording medium device 600, but in this embodiment, different The point is that the content distribution device 300b distributes the plaintext content to the terminal device 500b, and the key distribution device 400b distributes the plaintext title key to the recording medium device 600. The terminal device 500 b reads the plaintext tit...

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Abstract

When content stored in a recording medium device (600) is used in a terminal device (500), if the content attribute information for the content includes information for distinguishing the content from normal content, the recording medium device (600) refers to revoke information which indicates a terminal device in which usage of the content should be restricted when the information distinguishing the content from normal content is included, and, if the terminal device (500) is assessed to be a terminal in which usage of the content should be restricted on the basis of the identification information of the terminal device (500), the recording medium device (600) controls a usage information output means so as not to output information necessary for using the content.

Description

technical field [0001] The present invention relates to a content management system, in particular to a technology for controlling the use of content in a terminal device. Background technique [0002] Digital content such as movies, music, games, and electronic books is easy to copy content data, so there is a danger of illegal copying and use. Therefore, copyright protection measures are required to prevent illegal copying and use of content (hereinafter referred to as "illegal use of content"). [0003] As one of the copyright protection standards for content, there is AACS (Advanced Access Content System). AACS is a copyright protection standard used in BD (Blu-ray Disc (registered trademark)) (see Non-Patent Document 1). [0004] In AACS, a device key is issued from a key issuing device to a terminal device. Using the device key, the terminal device obtains a title key (title key) for decrypting encrypted content. In addition, in AACS, whether or not the device key ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/62
CPCH04N21/4334H04N21/2585G11B20/00847G06F21/10G11B20/00195H04L2209/60H04N21/8355G11B20/00427H04L9/3268G11B20/00224G11B2220/2541G11B20/00181G06F21/1062H04L9/32
Inventor 山口高弘布田裕一中野稔久
Owner PANASONIC CORP