A Database Watermarking Method Oriented to Copyright Protection

A copyright protection and database technology, which is applied in digital data protection, electronic digital data processing, special data processing applications, etc., can solve problems such as inability to guarantee data integrity, consistency and availability, and algorithm inapplicability, so as to achieve copyright protection , high robustness effect

Inactive Publication Date: 2016-03-30
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to propose a database text data watermarking method based on Unicode invisible characters for the current database text data watermarking technology that cannot guarantee the integrity, consistency and availability of data, and the algorithm is not applicable.

Method used

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  • A Database Watermarking Method Oriented to Copyright Protection
  • A Database Watermarking Method Oriented to Copyright Protection
  • A Database Watermarking Method Oriented to Copyright Protection

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Embodiment Construction

[0051] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0052] This embodiment selects an enterprise named experimental data published on the Internet, and provides an implementation of the present invention for the entire process of database test connection, preprocessing, watermark information generation, watermark embedding, data update, watermark detection, and detection result output For example, the present invention is further described in detail.

[0053] Such as figure 2 , the present embodiment selects a certain enterprise directory as the experimental data, and the database is stored in the Access database. The data consists of two tables, which are respectively 1000 rows of ELECCORP data tables containing 8 text fields and 1 primary key and 1000 rows of 5 text fields and 1 primary key for the MEDCORP data table.

[0054] (1) Watermark information generation:

[0055] Step 1: Input t...

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Abstract

The invention discloses a copyright protection-oriented database watermarking method. The method is based on Unicode database text data for digital watermark embedding and detection algorithm, including the following steps: Step 1: Select the seed number to generate a meaningless binary watermark sequence, and store copyright information and watermark sequence at the same time; Step 2: Establish invisible The mapping relationship between the character set and the binary watermark sequence; Step 3: Map the watermark sequence to an invisible character combination, embed it in the database and update the data; Step 4: When detecting, extract the characters belonging to the invisible character set in the database; Step 5 : According to the mapping relationship, map invisible characters to watermark information. Step 6: Recover the binary watermark sequence according to the watermark information, compare and calculate the correlation coefficient, and judge the copyright information accordingly. The method of the invention makes full use of the characteristics of invisible characters, and solves the problems of watermark lossless embedding and watermark synchronization of text data in the database.

Description

technical field [0001] The invention belongs to the field of information copyright protection, and specifically relates to a digital watermark embedding and detection method for database text data using invisible Unicode characters as watermark carriers and watermark positioning information, so as to realize source identification and copyright protection of database text data. Background technique [0002] The database is a system used to efficiently organize and manage data, which solves the problems of massive and diverse data storage, operation, and transmission. The data in the database is established from a global perspective, and is organized, described and storage. Its structure is based on the natural connection between data, which can provide all necessary access paths, and the data is no longer targeted at a certain application, but for the entire organization, with overall structural characteristics. The database provides services such as data query, data update,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/16G06F21/60G06F17/30
CPCG06F21/10G06F21/1063
Inventor 朱长青佟德宇任娜
Owner NANJING NORMAL UNIVERSITY
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