Embedding and extraction and verification method of value-type relational database watermark

A technology of watermark embedding and watermark extraction, which is applied in the field of database security, can solve problems such as being vulnerable to cracking, losing the technical meaning of watermarking, and poor security, and achieving the effect of maintaining watermark information

Inactive Publication Date: 2015-08-26
UNIV OF ELECTRONIC 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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  • Embedding and extraction and verification method of value-type relational database watermark
  • Embedding and extraction and verification method of value-type relational database watermark

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Experimental program
Comparison scheme
Effect test

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 water...

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PUM

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Abstract

The present invention, belonging to the field of computer security, relates to a copyright protection method for digital watermark of a value-type relational database, and in particular provides an embedding and extraction and verification method of value-type relational database watermark. The method comprises: mode and data analysis of a value-type relational database, generation and embedding of digital watermark, and detection method of digital watermark. According to the present invention, considering the characteristics of the value-type relational database, digital watermark information can be effectively, dynamically and uniformly injected to data, and the digital watermark information can be extracted in case of no data source. The method employs such technologies as key encryption and anti-repetition sequencing, can effectively resist various watermark attacks, and can ensure no watermark loss in case of row modification lower than 50%.

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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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 ELECTRONIC SCI & TECH OF CHINA
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