A Numerical Relational Database Watermark Embedding and Extraction Verification Method

A watermark embedding and watermark extraction technology, applied in the field of database security, can solve the problems of easy cracking, poor security, loss of technical significance of watermarks, etc., and achieve the effect of maintaining watermark information.

Inactive Publication Date: 2017-11-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But they have a common disadvantage, that is, poor security, easy to be cracked, and pirates can easily destroy or remove the watermark content, thus losing the significance of watermark technology

Method used

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  • A Numerical Relational Database Watermark Embedding and Extraction Verification Method
  • A Numerical Relational Database Watermark Embedding and Extraction Verification Method

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Embodiment

[0035] A numerical relational database watermark embedding and extraction verification method provided by the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] Taking taxi location information as an example, the following table is the data table dictionary.

[0037] column name

type of data

length

Remark

ID

Int

50

CompanyID

Varchar

50

taxi company ID

VehicleID

Varchar

50

Taxi ID

GPSTime

Datetime

8

GPS time

GPSLongitude

Float

8

GPS coordinates X

GPS Latitude

Float

8

GPS coordinate Y

GPS Speed

Float

8

GPS speed

GPS Direction

Float

8

GPS direction

Passenger State

Bool

1

passenger status

ReadFlag

Int

4

CreateDate

Datetime

8

[0038] The steps to implement watermark embedding for thi...

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PUM

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Abstract

The invention relates to a digital watermark copyright protection method for numerical relational databases, belongs to the field of computer security, and specifically provides a method for embedding, extracting and verifying watermarks of numerical relational databases. The method includes pattern and data analysis of numerical relational database, generation and embedding of digital watermark, and detection method of digital watermark. Aiming at the characteristics of numerical relational databases, the invention can efficiently and dynamically inject digital watermark information into data evenly, and extract digital watermark information without source data. The method adopts technologies such as key encryption and anti-reordering, which can effectively resist various types of watermark removal attacks, and can ensure that the watermark will not be lost when less than 50% of the rows are modified.

Description

technical field [0001] The invention relates to the technical field of database security, in particular to a watermark embedding method based on a numerical relational database. Background technique [0002] Digital watermarking technology is an effective means to realize the copyright protection of multimedia information in the network environment. With the widespread use of relational databases, people pay more and more attention to the copyright protection of databases, especially for companies that provide information services, such as weather services, talent market information, stock trading information, etc., and their main assets are a large number of data stored in the database. data. By embedding the watermark information representing ownership in the relational database, it can effectively prevent valuable data from being illegally embezzled and realize the copyright protection of the database. Therefore, the research and development of relational database water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/10
CPCG06F21/10
Inventor 刘小垒张小松江堂碧牛伟纳俞工淳唐海洋徐浩然孙恩博
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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