基于属性标记的关系数据库水印方法

摘要

数据库水印是保护数据库版权的一项重要技术.针对现有数据库水印方法无法抵抗有序关系模式变换攻击(ORSM)的问题,提出了一种基于属性标记的关系数据库水印方法.首先给出了有序关系模式变换攻击的定义,然后通过分析现有关系数据库水印算法无法抵抗ORSM攻击的问题,提出一种能够抵抗ORSM攻击的水印算法ALBWM,包括水印嵌入算法(ALBWM-EM)和水印检测算法(ALBWM-DT).实验结果表明,与传统数据库水印算法相比,ALBWM算法在不影响性能的前提下对ORSM攻击具有更好的鲁棒性.%Database watermarking is an important technology mainly used for copyright protection for database. Given the fact that current database watermarking methods cannot resist ordered relation schema mutation (ORSM ) attack, attributes labeling based relational database watermarking (ALBWM) algorithm is proposed. Firstly, the definition of ORSM attack is given. Then, through analyzing the fragileness of current watermarking methods under ORSM attack, ALBWM is introduced which includes watermark embed algorithm(ALBWM-EM) and watermark detect algorithm(ALBWM-DT). Experimental results indicate that compared with the traditional watermarking algorithms, ALBWM has better robustness against ORSM attack and does not affect performance.