基于有效位数的数据库数字水印

Digital Watermarking for Database Based on Effective Digit

根据关系数据库的特殊性,文章基于数值型字段值的有效位数,结合数字通信中的差错控制理论,提出了一种可以在关系数据库中嵌入具有实际意义字符串的数据库数字水印算法。理论分析和实验结果表明,该算法具有隐蔽性好,水印恢复不需要原始数据库,水印的鲁棒性及可嵌入的信息量可以通过调整参数取值进行调节等特点。该算法在数据库的版权保护中具有较好的应用前景。

This paper proposes a digital watermarking for relational databases algorithm,some significant character strings can be embedded into relational databases.This algorithm,which based on relational databases＇ character and the number of quantitative data＇s effective bits,combines with the theory of error correction in the field of digital communication.Theoretic analysis and experimental results show that this algorithm is good at hiding and it does not need the original databases in the recover progress,and also the robustness of watermark and the built-in information quantity can be adjusted by adjusting the value of parameter.This algorithm has a wide foreground in protecting the copyright of database.