Abstract: In real life，people want to know the tamper person position after the digital work is tampered.This paper proposes a copyright protection scheme for determining the scope of tamper person using fragile watermark and multiple robust zero watermark，which is combined with timestamp and digital signature technology.The experiment results show that the proposed scheme has high validity and robustness.In general，the scope is very small.

Key words: fragile watermark, multiple robust zero watermark, timestamp, digital signature

摘要： 在实际生活中，当数字文件被篡改后人们希望知道篡改者的位置。利用脆弱水印和多重鲁棒零水印技术，并与时间戳、数字签名技术相结合，提出了一种可确定篡改者范围的版权保护方案。实验表明，该方案有很好的有效性和鲁棒性，在一般情况下可以保证将篡改者确定在一个很小的范围内。

关键词: 脆弱水印, 多重鲁棒零水印, 时间戳, 数字签名