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中文摘要：
因为有删除字符并且在文本文件插入字符的不同修正类型，为图象认证的算法不能直接被用于文本文件认证。为文章文件认证的一个文章 watermarking 计划在这篇论文被建议。由和用户秘密钥匙提取特性串联的特征，计划作为自己被嵌进转变文章的水位标把文章的特征与用户信息相结合。接收装置能通过盲目察觉技术验证完整和文本的认证。进一步的研究证明它能也本地化 tamper，分类修正的类型，并且恢复部分 ofmodifiedtext 文件。上述的结论被我们的实验结果和分析证明了。
英文摘要：
Because there are different modification types of deleting characters and inserting characters in text documents, the algorithms for image authentication can not be used for text documents authentication directly. A text watermarking scheme for text document authentication is proposed in this paper. By extracting the features of character cascade together with the user secret key, the scheme combines the features of the text with the user information as a watermark which is embedded into the transformed text itself. The receivers can verify the integrity and the authentication of the text through the blind detection technique. A further research demonstrates that it can also localize the tamper, classify the type of modification, and recover part of modified text documents. The aforementioned conclusion has been proved by both our experiment results and analysis.
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