将拉格郎日插值公式进行密钥分存的思想引入到关系数据库数字水印的分存算法中,使得基于拉格朗日插值的关系数据库数字水印与无插值的相比鲁棒性有较大的提高。一位水印嵌入的是一种匹配关系,在正向匹配基础上,还提出了一种相反的匹配关系的嵌入,提高了每一位水印嵌入的可靠性,增强了水印的整体提取能力。
The digital watermarking of relational database based on Lagrange interpolation formula is robuster than the non-interpolated one.1 bit of watermark is embeded by a relational match,and a positive and negative relational match is proposed in embeding.Each bit of watermark is more reliable than the positive-embeded watermark.