Zero-watermarking algorithm about word document based on GB2312
Zhang Tai-zhong · Jisuanji gongcheng yu sheji · 2009
The text watermark algorithms are vulnerable to formatting attack .The current text watermarking methods are mostly based on format.To avoid formatting attack,a zero-watermarking algorithm about word document based on GB2312 is proposed.A zero-watermarking based on text content can be produced by comparing the GB2312 code of Chinese characters selected by a chaostic system.Formatting attack such as changing line distance,word distance,font,word size and copying can be resisted effectively for no changing text format.Simulation results show that the algorithm improve invisibility and robustness.