Secure database watermark construction method based on clustering weighted multi-dimensional bucket grouping
A construction method and database technology, applied in the field of information security, can solve the problems of fragile watermarks, few available methods, and difficult implementation, and achieve the effects of data quality protection, high reliability and accuracy, and improved usability
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[0037] The present invention will be further described below in conjunction with the accompanying drawings.
[0038] Such as Figure 1-2 A security database watermark construction method based on clustering weighted multi-dimensional bucket grouping shown mainly includes the steps of selecting database stable units and attributes according to the abstract domain; data clustering steps; building weighted multi-dimensional bucket grouping steps; and constructing security database watermark steps. Specific steps are as follows:
[0039] Step S1, select database stable units and attributes according to the abstract domain. After the database is subjected to external attacks (such as querying data, adding data, updating data, deleting data, etc.), the state of the database will change. When the value of a cell has not changed after being attacked, the cell is selected as a stable cell. Semantic-based attributes are divided into cell attributes, intra-tuple attributes, inter-tupl...
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