CAJ | 학술논문

文本水印容易受到格式化攻击,而目前文本数字水印技术主要集中于基于格式方面.提出一种基于GB23212国标码的Word文档零水印方案,该算法利用混沌映射确定被比较的两个汉字,基于汉字GB23212国标码比较两个汉字的大小,进而产生基于文本内容的零水印.该算法不改变文本格式,因此能较好地抵抗改变行距、字间距、字体,字号、复制等格式化攻击,有效提高了算法的鲁棒性及安全性.实验结果表明了该算法的有效性.
문본수인용역수도격식화공격,이목전문본수자수인기술주요집중우기우격식방면.제출일충기우GB23212국표마적Word문당령수인방안,해산법이용혼돈영사학정피비교적량개한자,기우한자GB23212국표마비교량개한자적대소,진이산생기우문본내용적령수인.해산법불개변문본격식,인차능교호지저항개변행거、자간거、자체,자호、복제등격식화공격,유효제고료산법적로봉성급안전성.실험결과표명료해산법적유효성.
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.