基于文字RGB颜色变化的脆弱型文本数字水印技术

给出了一种利用文本字体颜色的变化来进行文本认证的方案。通过提取文字的特征,结合用户密钥和哈希技术,该方案将文本信息和用户信息嵌入到待传输文本中。不需要额外传送文本特征值;接受端通过水印的提取以及特征提取等步骤,可以判断文本的完整性和文本的可信性。进一步的,可以定位文本篡改发生的位置。理论分析和实验结果都表明,对于通常的攻击,如果文字级联长度为m,则该方案检测和定位篡改的概率达到了1-1/(26)m。

A New Fragile Text Watermarking Technique Based on Change in Font RGB Color

A scheme of text authentication based on the font color is proposed in this paper.By extracting the features of the characters together with the user secret keys and the hash technology,the scheme embeds the information of the text and the user into the transforming text.and requires to transform no additional content-features.After the extraction and other processes performed by the receiver,we can determine the integrity and the creditability of the text,furthermore,we are able to locate the tamper in the text.The probability to detect and locate the tamper is up to 1-1/(2) for the ordinary attacking theoretically and experimentally if the length of characters cascade is m.