Zero-watermark method for database distribution protection

Abstract

The invention provides a zero-watermark method for database distribution protection, and the method comprises the steps: firstly enabling a table of an original database to be recombined into different table structures and numbers L for different distribution users before database distribution, and storing the recombined table through a T-F table; secondly, carrying out zero-watermark embedding onthe recombined database by means of the thought of attribute classification, and selecting important attributes for feature extraction by scoring the importance of variables through a random forest;then, registering the generated watermark key in a certificate authority to resist the attack of confusion identity verification; and finally, when a divulged database is discovered, preliminarily judging a user distributed for the first time according to the T-F table, performing zero-watermark extraction detection on the user, and finishing final copyright judgment by comparing an extracted watermark key with a watermark registered in a certificate issuing institution, thereby realizing traceability of the first distribution. Compared with a traditional zero-watermark scheme, the method hasthe advantage that the secret divulging and tracing capacity is improved.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a zero watermark method for database distribution protection. Aiming at the possible leakage of the database during distribution and the difficulty of tracing the source after the leakage, a zero-watermark scheme that can effectively track the first distributor is designed. Background technique [0002] At this stage, most of the data in the database are stored dynamically, and these data often need to be analyzed and mined to realize their potential value. So, this means that the data in these databases may only be stored in one place, and they often need to be distributed to various institutions in order to fully realize the potential value of the data. However, when the database data is distributed, it also faces various threats: (1) During the distribution process, insiders sell data for their own interests. (2) Distribution users maliciously leak d...

AI Technical Summary

Problems solved by technology

Mainly for the traceability of database leaks, the first distributor is initially tracked by using database reorganization and distribution, and then the watermark key is generated from the reorganized database through the zero watermark algorithm based on the idea of ​​attribute classification, and the first distributor is further determined and tracked to solve the problem. Meet the traceability requirements for the first distribution of the database, more accurate and effective traceability

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