摘要
针对常规网页水印算法隐蔽性差、隐藏信息量受网页内容限制的问题,提出了一种新型的网页水印嵌入技术.通过在网页中嵌入一副小尺寸图像的方式,将水印隐藏于图像中.分析了现有网页水印算法的缺点,设计了由哈希函数和混沌序列相结合的水印生成算法,提出了将网页内容分段并转换为ASSIC码的方式生成位置水印.描述了图像频域水印的嵌入与检测过程.通过实验验证了算法的隐蔽性以及篡改检测的有效性.
Targeted at the poor concealment of the conventional webpage watermark and the limitation of the embedded information quantity to the contents of the webpage, a novel webpage tamper proof technology is proposed to solve the problems. A small image is embedded into the webpage; the watermark is hidden in that image. The defects of the existing webpage watermark technology are analyzed. The watermark is produced using the hash function and chaotic sequence. Web content is segmented and converted to ASSIC code to generate position watermark. The watermark embedding and detection process in the image frequency domain is described. The experimental results illustrate the superb concealment of the algorithm and the effective tamper proof.
出处
《绍兴文理学院学报》
2014年第9期15-19,共5页
Journal of Shaoxing University
关键词
网页水印
隐蔽性
哈希函数
混沌序列
图像频域
webpage watermark
concealment
hash function
chaotic sequence
image frequency
