Secure exportation from a global copy protection system to a local copy protection system

A technology of copy protection and local copy, which is applied in the direction of program/content distribution protection, instrument, electronic digital data processing, etc., and can solve the problem of “can’t copy again” and so on

Inactive Publication Date: 2005-11-30
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this is not enough, as you can create as many "no more copy" copies as you want from the "private copy" content

Method used

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  • Secure exportation from a global copy protection system to a local copy protection system
  • Secure exportation from a global copy protection system to a local copy protection system

Examples

Experimental program
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Effect test

Embodiment Construction

[0023] figure 1 The environment of the present invention is shown. For example, it may be a digital home network 1 protected by a global CPS. This network includes two access devices 12 and 13 and two recorder devices 14, 15 which are connected together by a digital bus 16.

[0024] Documents FR-A-2 792 482 and FR-A-2 824 212 disclose the principle of data protection through global CPS in a home network.

[0025] The following equipment ensures the interaction between local and global CPS:

[0026] -Access equipment to receive local CPS protected content from outside the network and convert it to global CPS protected content; and

[0027] -Recorder device for creating a global CPS protected copy 10 or a local CPS protected copy 11.

[0028] Now, the access device operation and the recorder device operation are described in more detail in accordance with the principles of the present invention.

[0029] 1. Access equipment operation

[0030] When the access device needs to conver...

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PUM

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Abstract

The invention relates to a device for preventing illegal exportation of a content protected by a global copy protection system to a local copy protection system. According to the invention, each content liable to be exported contains a unique identifier and the device comprises a table for storing unique identifiers of all contents that have already been exported through said device. The invention also relates to a method for recording a content received by such a device. This method comprises the steps consisting, if the copy is to be made for a local copy protection system, in checking whether the unique identifier of said content is contained in the table of said device; and should said checking be positive, in preventing the recording; andshould said checking be negative, in recording the content and storing said unique identifier in said table.

Description

Technical field [0001] The present invention relates generally to copy protection issues. More specifically, the present invention relates to an apparatus and method for preventing illegal output of content from a global copy protection system to a local copy protection system. Background technique [0002] In recent years, copy protection has become a hot topic. The first copy protection system (CPS) that has been studied relies on link encryption (for example, see the "Digital Transmission Copy Protection Specification-Volume 1 (Information Edition)-Revision 1.2-July 11, 2001" DTCP" recommendations are available at the following URL: http: / / www.dtcp.com / data / info_dtcp_v1_12_20010711.pdf") or pre-recorded / recordable media protection (for example, see the "Content Protection System Architecture, Content Protection The comprehensive framework-Revised 0.81-February 17, 2000 "CPSA" recommendations disclosed in ", available at the following website: http: / / www.4centity.com / data / tech / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/00G06F21/10
CPCG06F21/10G06F1/00
Inventor 阿兰·杜兰德埃里克·迪尔让-皮埃尔·安德罗克斯
Owner THOMSON LICENSING SA
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