A watermark traceability method for identity card data desensitization

Abstract

The invention discloses a watermark traceability method for ID card data desensitization. In order to overcome the problems of high traceability error rate of digital watermarks in the prior art, poor traceability results, and inability to leave the database; the present invention includes the following steps: S1: extract data from the data source, find the ID card rule field in the data source, and perform Desensitization; S2: Obtain several watermark numbers, add digital watermark marks to the desensitized data using watermark numbers, and calculate check digits; S3: import suspicious data into memory, and filter non-added digital watermarks according to the check digits of the data Marked data; S4: extract digital watermark information according to the reverse process of adding digital watermark; S5: determine data source according to watermark number. A data source corresponds to several watermark numbers, which can make the traceability result find a specific data source, improve the credibility of the traceability result, and break away from the dependence on the database.

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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