期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2015
卷号：3
期号：4
DOI：10.15680/ijircce.2015.0304067
出版社：S&S Publications
摘要：In this paper, an imperceptible, fragile text watermarking algorithm has been proposed. The font color ofeach alphabet in the text document is varied in the greyscale in accordance with a sine function. The amplitude for thesame is generated using a hash function. The authenticity of the received document can be verified by comparing theactual color values of the letters in the document with the expected values generated by the sine function. This schemeis highly sensitive to various malicious text related tampering attacks hence preserving the integrity of the document.Unlike earlier methods, the proposed algorithm provides tamper detection while maintaining watermark invisibility.The attack analysis illustrates that the scheme is efficient and secure
关键词：Greyscale; sine wave; text watermark; digital watermark; hash function; tamper detection
