The Research Based On Features Of Chinese Characters In Chinese Text Digit Watermarking Algorithm

Looking from the current massive publication's paper, the domestic and foreign existing text information hiding technology between the watermark capacity, the confidentiality, robustness, the security has the contradiction which generally cannot be balanced, and study abroad is mainly based on English text format of information hiding, the domestic research in this area started late, basically stay in the foreign research results complement and improve on, and research on the Chinese and even less.The Chinese character is one kind of multi-faceted writing, its structure is unique, mostly is not suitable based on English text format's information hiding technology for Chinese text, regarding the use Chinese character to record information such as my country, according to the Chinese character unique characteristic, studies based on Chinese text information hiding will be a great potential for research.In view of this, this article in consults and in the analysis massive literature material foundation, take carries on the information hiding in Chinese Word documents to use for to protect the copyright as the starting point to explore, is bad in view of the present text watermark algorithm existence robustness, the confidentiality to be insufficient and the watermark capacity small question, studied and proposed one kind of based on Features of Chinese characters in Chinese Text Digit Watermarking Algorithm. This article detailed design this algorithm flow.First presents the frequency and the stroke number to the common character carries on the massive statistical analysis, obtains the basis average stroke number to be even the entire text divides into two thought; then the level of frequency for the order of two rows of each character good order, the secret information were repeated in reverse order of two embedded in the text in each character;Ensure that the same Chinese characters when embedding the watermark bit embedded information is the same.Embedded in these three position selection strategy, an increase of attackers targeted attacks more difficult, and raised the ability to recover the watermark after the attacks. In addition to Chinese characters are also studied as a unit of some of the special attributes,the attribute value changes as the watermark embedding in a manner that does not affect normal use of the same text has a very high concealed. At the same time, in the watermark generation phase also uses the RSA asymmetric encryption technology, sufficient to ensure the security of watermark to prevent unauthorized detection and embedding. And using (7,4) Hamming code theory, watermarking information on the error correction coding, text watermark detection using error-correcting code integrity, better for tamper detection and error recovery.Finally, the various properties of the watermark a large number of tests to simulate the targeted attacks on the watermark text. Experimental results show that the algorithm this paper has obvious characteristics of Chinese characters, and the higher the concealment, robustness and resistance to attack. May say that this article algorithm's most major characteristic is the strong robustness, can resist from the text format aspect attack and to the text content partial failure.