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Pre-encryption method of CD-ROM

An encryption method and optical disc technology, which is applied to instruments, recording signal processing, data recording, etc., can solve the problems of unfavorable production convenience, insufficient technology, complicated implementation methods, etc., and achieve the advantages of convenient production of encrypted optical discs and simplified process flow Effect

Active Publication Date: 2016-07-06
JIANGSU XINGUANGLIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prevent CD piracy, people have studied some anti-piracy schemes, but some of the previous schemes are not sophisticated enough and easy to be cracked, and some implementation methods are too complicated, which is not conducive to the convenience of production

Method used

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  • Pre-encryption method of CD-ROM

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0018] Such as figure 1 Shown:

[0019] Before burning the master disk, the parent source data needs to be preprocessed in the same way as before, that is, the parent source data should be logically encrypted. Do the following steps,

[0020] a-1, use Nero recording software to create the disc data format according to the carrier form of the parent source data provided by the customer (such as DVD-ROM or DVD_VIDEO);

[0021] a-2, according to the requirements of the carrier form, write the encrypted directory in the data format of the optical disc, then write the parent data provided by the customer into the data format of the optical disc, and then generate the image file ISO or NRG; the customer provides The parent source data includes data directory and data file;

[0022] a-3, use the UltraEdit editing software to open the image file, and hide the encry...

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Abstract

The invention provides a compact disc read only memory (CD-ROM) pre-encryption method which comprises the following steps: a, logically encrypting source data; and b, recording a mother disc, wherein the step of burning a mother disc comprises the following substeps: b-1, reading the source data into a mother disc data system; b-2, modifying the burning program, so that the laser changes the burning pulse signal corresponding to an encrypted burning area, and the burning pulse signal can burn pits with the non-standard length of 15-25T in the encrypted burning area; and b-3, burning the mother disc by using the modified burning program, burning the pits with the non-standard length of 15-25T in the encrypted burning area, and burning in a normal mode in other normal data areas beyond the encrypted burning area. According to the method, the non-standard pits which cannot be identified by the CD-ROM are burned at the specific positions, and the encrypted burning area of the mother disc does not need to be burned again after the mother disc is burned, so that the process flow is simplified, and the encrypted optical disk is conveniently manufactured.

Description

technical field [0001] The invention relates to the field of optical disc processing, in particular to a read-only optical disc encryption method for preventing illegal duplication of optical discs. Background technique [0002] At present, CD-ROMs are widely used, among which CD-ROMs in DVD format have the advantages of large data capacity and low production cost, and are welcomed by industry players in many industries such as publishing, film and television, and software. However, the piracy of optical discs is rampant at present, and copyright holders have spent a lot of effort and money on achievements, which are often easily stolen by pirates, resulting in financial and technical losses. How to prevent the piracy of CD-ROM has become an urgent problem to be solved at present. In order to prevent CD piracy, people have studied some anti-piracy schemes, but some of the previous schemes are not sophisticated enough and easy to be cracked, and some implementation methods a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B20/00
Inventor 张科张琦许雪芳
Owner JIANGSU XINGUANGLIAN TECH
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