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Information carrier comprising access information

An information carrier and a technology for accessing information, which is applied in the field of information carriers including accessing information, and can solve problems such as the increase of signal bandwidth.

Active Publication Date: 2009-11-11
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In spread spectrum techniques, the bandwidth of the signal is intentionally widened using spread spectrum modulation

Method used

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  • Information carrier comprising access information
  • Information carrier comprising access information
  • Information carrier comprising access information

Examples

Experimental program
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Embodiment Construction

[0022] It is necessary to keep certain parts of the copy protection scheme secret, not only the encryption key, but also some signal processing or modulation of the storage key or ID number. It is then necessary to provide a "black box" to the control facility as a formatter and to provide a VERILOG description to the IC developer of the decoder. So, in the decoder part, or in the side channel, there is one (or more) secrets. This secret requires specific hardware to detect. In this case, it is impossible for a hacker to succeed simply by changing the application software or the drive firmware. Contrary to the situation where such secrecy is required, it is necessary for us to test the media during the manufacturing phase. One approach is to use a scrambling method at one or more stages in the signal processing path and switch the scrambling method at a designated test area. In the non-scrambled area, a "test key" can be read out to test the boundary, to recover the secret ...

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PUM

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Abstract

The invention relates to an information carrier for holding user information, the information carrier comprising access information in the form of access information bits for accessing the user information, the access information bits being stored on the information carrier in a variation of a parameter, which variation is detectable by integration detection. The access information bits are scrambled according to a pre-determined scrambling method. By scrambling the access information bits according to a pre-determined scrambling method detection of the access information is not possible as long as the scrambling method is not known. Using the integration detection technique only results in the access information is one knows how the signal obtained after reading-out the area comprising the access information bits must be processed. In this way illegal retrieval of the user information is further prevented.

Description

[0001] This case is a divisional application with the application number 200480004681.3, the filing date is February 5, 2004, and the invention title is "Information Carrier Including Access Information". technical field [0002] The invention relates to an information carrier for storing user information, the information carrier includes access information in the form of access information bits, the access information bits are used to access user information, and the access information bits are stored on the information carrier according to changes in parameters, Said changes can be detected by integral detection. The invention also relates to a device for reading information from an information carrier. Background technique [0003] The technique of hiding access information on an information carrier for storing user information is based on the fact that you distract other people (hackers) from the access information you want to hide. Using this access information, the us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/00G06F21/60G06F21/62
CPCG11B20/00086G11B20/0021G11B2020/1288G11B20/00586G11B20/00579G11B20/00304G11B2220/2541G11B20/00405G11B20/10G11B20/00
Inventor A·斯特克M·W·布鲁姆B·范罗帕伊J·P·J·希姆斯克
Owner KONINK PHILIPS ELECTRONICS NV