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A Safe and Reversible Relational Database Copyright Protection Method

A copyright protection and database technology, applied in the computer field, can solve problems such as lack of error correction ability of binary strings, data copyright disputes, damage to interests, etc., to achieve the effect of resisting common attacks, avoiding LBS pathological phenomena, and improving the detection rate

Active Publication Date: 2022-04-05
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the rise of data outsourcing services and data mining, in the process of data copying, reproduction and dissemination, data copyright disputes are prone to occur, which seriously damages the interests of owners.
The application number is CN201310624375.0, and the name is a copyright protection-oriented database watermarking method, which discloses the embedding and detection algorithm of digital watermarking based on Unicode database text data, which selects the seed number to generate a meaningless binary watermark sequence, Store copyright information and watermark sequences at the same time; establish the mapping relationship between invisible character sets and binary watermark sequences; map watermark sequences into invisible character combinations, embed them in the database and update the data, and use chaotic encryption to embed only meaningless strings. Lack of error correction capability for binary strings converted from watermark information

Method used

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  • A Safe and Reversible Relational Database Copyright Protection Method
  • A Safe and Reversible Relational Database Copyright Protection Method

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: as figure 1 As shown, it is a schematic diagram of the overall functional structure implemented by the present invention. The present invention provides a digital watermarking algorithm for numerical attributes of relational databases. Specifically include the following steps:

[0037] A. Convert watermark plaintext to binary sequence;

[0038] B. Use chaotic encryption to scramble the watermark binary sequence, and add BCH (31,16,7) error control codes to the scrambled sequence;

[0039] C. Execute the watermark embedding program with each redundant numerical attribute column as a unit; determine the embedded watermark tuple according to the database owner's personal private key and embedding ratio, and determine the watermark selected for this embedding process according to the watermark length The watermark bit value in the information binary sequence, and the value bit to be modified is randomly selected;

[0040] D. Publish the database table embe...

Embodiment 2

[0066] Embodiment 2: In this embodiment, the geographic location database is used as an example to carry out this instance. An example of part of the data in the database is shown in Table 2.

[0067] Table 2 Partial data example of the database

[0068] user id longitude 2011024425454226447 122.102229 2226391011334799248 123.344526 3243242432444454345 121.2313343 3232432444445544334 123.323223 3242224344552231324 122.233323

[0069] Step 1: The watermark information to be embedded is a binary image, such as figure 2 As shown, converted to binary "0000000000000000000000000...00111100000011000000000000000000

[0070] 0000111011001111111110000001100011111111110...00001110011100

[0071] 00…0000000000000000000000” with a total of 2304 digits;

[0072] Step 2: Group each 16-bit group. Let μ=3.8, X0=0.5, then have

[0073] X(k+1)=3.8Xk(1-Xk)

[0074] Scramble each group according to the above function. For example, if a sequence is ...

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Abstract

The present invention relates to a safe and reversible copyright protection method for relational databases, which solves the technical problem that the relational databases are prone to data copyright disputes and damages the interests of owners, and comprises the following steps: A. converting watermark plaintext into binary sequences; B. . Use chaotic encryption to scramble the watermark binary sequence, and add an error control code to the scrambled sequence for error control; C. Execute the watermark embedding program in units of each redundant numerical attribute column; according to the database owner The personal private key and the embedding ratio determine the embedded watermark tuple, determine the watermark bit value in the watermark information binary sequence selected for this embedding process according to the watermark length, and randomly select the value bit to be modified. The present invention can be widely applied to situations where data copyright disputes are likely to occur in the process of data copying, duplication and dissemination.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a safe and reversible relational database copyright protection method. Background technique [0002] With the rise of data outsourcing services and data mining, data copyright disputes are likely to arise during the process of data copying, duplication, and dissemination, which seriously damages the interests of owners. The application number is CN201310624375.0, and the name is a copyright protection-oriented database watermarking method, which discloses the embedding and detection algorithm of digital watermarking based on Unicode database text data, which selects the seed number to generate a meaningless binary watermark sequence, Store copyright information and watermark sequences at the same time; establish the mapping relationship between invisible character sets and binary watermark sequences; map watermark sequences into invisible character combinations, embed them in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/16G06F21/60G06F16/28
CPCG06F21/16G06F21/602G06F16/284
Inventor 闫健恩李文玲张兆心许海燕吴庆港
Owner HARBIN INST OF TECH AT WEIHAI
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