Anonymous digital watermarking embedding and extracting method

A technology of digital watermarking and watermark embedding, which is applied in electronic digital data processing, program/content distribution protection, instruments, etc., can solve the problems of digital anonymization of data, and achieve the effect of protecting rights and good concealment

Active Publication Date: 2016-04-20
MR RAY CHENGDU TECH CO LTD
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[0008] The purpose of the present invention is to provide an anonymized digital watermark embedding and ex

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  • Anonymous digital watermarking embedding and extracting method
  • Anonymous digital watermarking embedding and extracting method

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[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0040] First of all, the only and iconic data to be protected according to the need is the watermark information that needs to be embedded. For example, the user's ID number, time, etc.

[0041] figure 1 An embodiment of an anonymized digital watermark embedding method of the present invention is shown: an anonymized digital watermark embedding method, comprising the following steps:

[0042] Step 1: Perform watermark string generation processing on the watermark information to be embedded, randomly generate the salt required for the hash according to the size of the watermark string, and add sal...

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Abstract

The invention relates to database safety technology and data anonymization, and specifically relates to an anonymous digital watermarking embedding and extracting method. The embedding method comprises steps of determining watermarking information needing to be embedded, carrying out hash processing, carrying out salted hash calculation, carrying out watermarking index calculation, and obtaining an anonymous data set with a copyright mark after watermarking is embedded; the extracting method comprises steps of reading the anonymous data set, carrying out watermarking index calculation to each row of data, extracting watermarking, reducing watermarking information through a voting mechanism after all rows of data is extracted, and outputting the extracted watermarking information. According to the invention, data is anonymized, at the same time, digital watermarking information is embedded, the imperceptibility is good, private data is prevented from being leaked, rights of the data publisher are guaranteed at the same time, dynamic data publishing is supported, and multi-data source data publishing is supported.

Description

technical field [0001] The invention relates to database security technology and data anonymization, in particular to an anonymized digital watermark embedding and extraction method. Background technique [0002] In recent years, people have been witnessing a data explosion. The analysis and mining of big data has greatly facilitated our lives. However, most of the analyzed data is proprietary and contains many personal or business interests. Sensitive information. Examples of sensitive data include patient records, special housing information, tax records, customer purchase records, mobile call detail records (CDRs), etc. The very sensitive nature of such datasets prohibits their direct disclosure. It needs to be processed and released with appropriate privacy protection technology. [0003] 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 ...

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Application Information

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IPC IPC(8): G06F21/16
CPCG06F21/16G06F21/1063
Inventor 陈瑞霞
Owner MR RAY CHENGDU TECH CO LTD
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