藏文Web网页的信息隐藏研究

Research on Information Hiding Method for Tibetan Webpage

针对藏文Web页面信息隐藏技术隐蔽性差、隐藏容量小、抗干扰性弱问题,提出了一种具有同步机制的藏文Web页面信息隐藏方法。该方法先对秘密消息的二进制序列进行置乱处理,添加具有同步性的巴克尔码以形成新消息序列,并通过改变HTML标签属性名称的大小写状态来表示该序列中的0或1,实现秘密消息在藏文Web页面内的隐藏。实验结果表明,与其它方法相比,该方法在保证隐蔽性的情况下,能有效提高隐藏容量,在随机扰乱程度较大时具有更好的鲁棒性。

In order to solve the problem of weak covertness,small hiding capacity and poor robustness of Tibetan webpage information hiding（ IH） technique,a novel IH scheme with synchronization mechanism for Tibetan webpage（ IHSTW） is proposed. Firstly,the bit sequence of secret message is disordered by scrambling transformation algorithm.Then the synchronous Baker code is added into this scrambled bit sequence to form a new bit sequence. Lastly,the bit ＂ 0＂ and ＂ 1＂ of this new bit sequence is embedded into Tibetan webpage through changing the upper or lower case of tag attribute names in its HTML code. Experimental results show that,compared with other existing IH methods,IHSTW can increase the information hiding capacity effectively with good covertness and present better robustness under heavy random perturbation.