Copyright protection oriented database watermarking method

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: 2014-03-19
NANJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
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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

Method used

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  • Copyright protection oriented database watermarking method
  • Copyright protection oriented database watermarking method
  • Copyright protection oriented database watermarking method

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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 to carry out imbedding and detecting algorithm of a digital watermark based on database text data of Unicode, and comprises the following steps of: 1, selecting a seed number to generate a meaningless two-value watermark sequence and storing copyright information and the watermark sequence; 2, establishing a mapping relationship between an invisible character set and the two-value watermark sequence; 3, mapping the watermark sequence into an invisible character combination, embedding the invisible character combination into a database and updating data; 4, extracting characters belonging to an invisible character set from the database while detecting; 5, mapping the invisible characters into watermark information based on the mapping relationship; 6, recovering the two-value watermark sequence based on the watermark information, comparing and calculating relevant coefficients, and accordingly judging the copyright information. The copyright protection oriented database watermarking method fully utilizes the characteristics of the 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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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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