Watermark tracing method for identity card data desensitization

Abstract

The invention discloses a watermark tracing method for identity card data desensitization. The problems that in the prior art, the digital watermark tracing error rate is high, the tracing result is poor in credibility and cannot be separated from a database are solved. The method comprises the following steps of S1, extracting data from a data source, finding out an identity card rule field in the data source, and performing desensitization; Ss2, acquiring a plurality of watermark numbers, adding a digital watermark mark to the desensitized data by using the watermark numbers, and calculatinga check bit; Ss3, importing the suspicious data into a memory, and filtering the data not added with the digital watermark mark according to the check bit of the data; Ss4, extracting digital watermark information according to the inverse process of adding the digital watermark mark; and S5, determining a data source according to the watermark number. One data source corresponds to a plurality ofwatermark numbers, so that the tracing result can find a specific data source, the credibility of the tracing result is improved, and the dependence on a database is avoided.

Description

technical field [0001] The invention relates to the field of data security, in particular to a watermark traceability method for ID card data desensitization. Background technique [0002] In view of the data leakage problem that often occurs in the current society, it often brings certain losses to some groups and enterprises. Finding the source of the leak and stopping the loss in time is an urgent problem to be solved. [0003] In the current digital watermarking technology, for the digital watermark of pure digital character string or numeric type, some methods are related to attribute information (ie, field information) in the database. Calculate the number corresponding to the current attribute value by using the attribute value, attribute name, user secret key and other information through a one-way hash function, then judge whether to add a watermark according to the divisible calculation, and then calculate the parity of the attribute value according to the parity ...

AI Technical Summary

Problems solved by technology

[0009] The present invention mainly solves the problems in the prior art that digital watermark traceability has a high error rate, traceability results are not convincing, and cannot be separated from the database; it provides a watermark traceability method for ID card data desensitization, and reduces errors through double guarantees of check digits and hit rates , the extracted watermark information can correspond to a data source. This method can improve the credibility of the traceability results, and does not use information related to the database so that the data does not need to be stored in the database. When suspicious data is found, the data can be used directly. Perform watermark traceability

Its purpose is to solve problems such as high errors, unconvincing traceability results, dependence on databases, and poor support for non-numeric data

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