基于连通图的文档数据库水印算法

With the wide application of Web technology and big data, non-relational database (NoSQL database) occupies an increasingly important position. Document database is the most widely used NoSQL database. However, the security of document database has not been paid attention to, so far there are few research results related to watermarking algorithm about document database. In order to solve this problem, a document database watermark scheme based on the connectivity diagram is proposed. According to the real documeDocument Database Watermark Algorithm Based on Connected Diagramnts in the database, the pseudo-documents are generated by genetic algorithm, and the watermark is embedded in the pseudo-documents. The adaptability function ensures the fusion of real and pseudo documents. So that attackers cannot distinguish between real and pseudo documents, which increases the difficulty of attack. By forming pseudo-documents into k-connect diagrams with pointer fields in pseudo-documents, legitimate users can distinguish between real and pseudo documents through connectivity. Experimental data show that the scheme achieves good visibility and robustness.