Digital watermarking algorithm of relational database

A digital watermarking and database technology, applied in the database field, can solve the problems of content confidentiality and privacy, data authenticity and integrity threats, etc.

Active Publication Date: 2020-10-20
HARBIN INST OF TECH AT WEIHAI
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  • Description
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  • Application Information

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Problems solved by technology

[0005] In order to solve the threats of copyright protection, content confidentiality and privacy, and data authenticity and integrity faced by the

Method used

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  • Digital watermarking algorithm of relational database
  • Digital watermarking algorithm of relational database
  • Digital watermarking algorithm of relational database

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Embodiment

[0041] Example: such as figure 1 As shown, it is a schematic diagram of the overall functional structure implemented by the present invention, and the steps of the present invention include:

[0042] Step 1. The data in the original database is preprocessed. The data preprocessing includes the generation of optimal replacement words and virtual splitting of attribute columns.

[0043] Among them, the generation of optimal replacement words is performed on all tuples under each column attribute, including the following steps:

[0044] A. Take the attribute value of each tuple, execute the Chinese word segmentation program, get all the phrases that can be replaced, and number these phrases from 0 in the order of appearance; check whether there are synonyms during the Chinese word segmentation process, and if there are synonyms, it will be The synonym obtained in the word segmentation is used as the candidate value of the similar word, and the replaceable word and its tuple, att...

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Abstract

The invention relates to a digital watermarking algorithm of a relational database. The threat problems of copyright protection, confidentiality and privacy of content and authenticity and integrity of data faced by the security of the existing database are solved. The method comprises the following steps: 1, preprocessing data; 2, converting a watermark plaintext into a binary sequence by using aprivate key of a database copyright owner; 3, respectively executing a watermark embedding program by taking each attribute value as a non-numerical attribute column of the natural language as a unit; 4, publishing the database table embedded with the watermark; 5, when a copyright dispute occurs, carrying out watermark extraction work on the database table with the copyright dispute, and using the watermark as an effective proof of copyright affiliation; and 6, completing watermark extraction according to the personal private key of the database owner, the key corresponding to the attributecolumn, the existence of the virtual splitting column and the embedding process operation record involved in step 3. The method can be widely applied to copyright protection of character database security.

Description

technical field [0001] The invention relates to the field of databases, in particular to a digital watermark algorithm for relational databases. Background technique [0002] Copyright protection has become a focus in the field of intellectual property. The development of the network has brought faster channels and wider space for the development of culture. At the same time, it has become an unavoidable problem that intellectual property rights are more likely to be violated in the network. In the protection of intellectual property rights, due to the particularity that literary works are only composed of words, it is difficult to load property rights information, which brings certain difficulties to the protection of intellectual property rights. [0003] The Chinese invention patent application with the application number 201010232710.9: "Works Copyright Protection Law" discloses a copyright protection scheme for Chinese works, which is based on the Chinese information h...

Claims

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Application Information

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IPC IPC(8): G06F21/16G06F40/284G06F40/289G06F16/28
CPCG06F21/16G06F40/284G06F40/289G06F16/284
Inventor 李文玲闫健恩许海燕张兆心谷杰铭张奕欣
Owner HARBIN INST OF TECH AT WEIHAI
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