Abstract: Embedding ownership’s information as watermarking into relational database for its copyright protection is a new heated research on database security. A new relational database watermarking algorithm based on image is presented on the basis of transforming the least significant bits of numerical data. It uses labeling algorithm and vector iteration to embed watermarking into relational database. According to the statistic independent weights, it uses FastICA algorithm to pick up watermarking and original data. Experimental results show that in a blind-measure environment, the watermarking has good resistance to attacks.

Key words: watermarking, relational database, labeling algorithm, iterate vector, FastICA algorithm

摘要： 在关系型数据库中嵌入代表所有权的水印信息，实现其版权保护，是数据库安全领域新的研究热点。该文利用数值型数据最低有效位的变换，提出了一种新的基于图像的数据库水印算法。该算法使用标记算法和向量迭代算法，实现了水印图像在关系型数据库数据中的嵌入。根据水印的分量统计独立性，采用FastICA算法提取出水印图像和原始数据。实验结果表明，在盲测环境中该水印具有很好的抗攻击能力。

关键词: 水印, 关系型数据库, 标记算法, 向量迭代, FastICA算法

CLC Number: 

• TP301.6