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Device for processing and method for transmission of encoded data for a first domain in a network pertaining to a second domain

A data processing device, a technology for processing devices, applied to components of TV systems, analog security/charging systems, key distribution, and can solve the problem that two domains cannot be linked together, etc.

Inactive Publication Date: 2007-06-27
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In case of aggregation, if each user has its own domain upfront, the two domains cannot be linked together since the devices of the two domains do not share the same key

Method used

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  • Device for processing and method for transmission of encoded data for a first domain in a network pertaining to a second domain
  • Device for processing and method for transmission of encoded data for a first domain in a network pertaining to a second domain
  • Device for processing and method for transmission of encoded data for a first domain in a network pertaining to a second domain

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0051] Initially, with reference to FIG. 1 , an example of a home network will be described in which a system for preventing copying is implemented so that private copies of digital content can be made for future use only in the home network where copies have already been made.

[0052] The network comprises: a source device 1, a presentation device 2, a recording device 3, interconnected by a digital bus 4, eg according to the IEEE 1394 standard.

[0053] The source device 1 comprises a digital decoder 10 equipped with a smart card reader equipped with a smart card 11 . The decoder receives digital data, in particular audio / video programs distributed by service providers.

[0054] The presentation device 2 comprises a digital television receiver (DTV) 20 equipped with a smart card reader fitted with a smart card 21 and, in particular, the recording device 3 is a digital video cassette recorder (DVCR).

[0055] The digital data input into the network via the source device 1 i...

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PUM

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Abstract

The invention relates to a processing device for connection to the network of the second domain for receiving encoded data from an encoding process unique to the first domain, comprising a memory for holding a first secret unique to the first domain, decoding means (210) for encoded data by means of the first secret to give decoded data, means for encoding (210) decoded data (CW) according to an encoding process unique to the second domain such that the encoded data produced by said means for encoding can not be decoded without a second secret (KN2) unique to the second domain. The invention relates to the method for transmission of encoded data within the network of the second domain by means of the secret unique to the first domain.

Description

technical field [0001] The present invention relates to the field of preventing copying of digital data and unauthorized access to such data, especially when the data travels in a local digital network such as a digital home network. Background technique [0002] In the context of protecting digital data against illicit copying, in known systems digital content can be copied for use in defined domains. A domain is used to denote, for example, a group of devices belonging to the same home network that share keys specific to the domain, eg cryptographic encryption keys. The devices belonging to the domain may be portable devices. Membership of a particular domain will be determined by knowing a key specific to that particular domain. [0003] The digital content of such a domain can be of the following three types: [0004] - "copy free": content of this type can be recorded and played back in any domain, so that it is not necessary to know domain-specific keys in order to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/16H04N7/167H04L9/08
CPCH04N7/163H04N21/4122H04N21/4367H04N7/1675H04N21/4147H04N5/913H04N21/4405H04N21/647
Inventor 阿兰·迪朗西尔万·勒列夫尔克里斯托夫·洛朗
Owner THOMSON LICENSING SA