Research On New Method Of Information Hiding For OOXML Document

The increased role of Internet and information technology in communication has brought a lot of convenience.At the same time,it also attracts people's attention to information security and copyright protection.As an effective means,information hiding technology has become an important research direction in the field of information security.Carrying information by text is one of the most widely used and widely spread information modes in Internet information exchange.Therefore,the study of text information hiding method is of great significance to protect text data copyright and document information security.The OOXML format is a new format adopted by Word 2007 and later versions.It has gradually become one of the most widely used electronic document formats.Therefore,this paper focuses on the new method of information hiding based on OOXML documents.The main contents of the study are as follows:(1)A novel information hiding method based on the Splitting of Text Elements is proposed.The main document body of OOXML document consists of the text elements that correspond to the content of the document.It is found that,in the OOXML format,the printable text in an element can be “split” by separating the element into multiple elements.The digital code of the information determines if the adjacent characters in the text will be “split” or not,so as to achieve the purpose of information embedding.Experiments show that the method has good imperceptibility and large capacity.Meanwhile,the proposed method can deal with many kinds of attacks,including “content”,“save as”,“copy” and “format”.(2)A multiple information hiding scheme is designed.This solution can not only be applied to copyright protection and secret communication,but also can effectively detect and locate tampering attacks.The proposed scheme consists of three kinds of information hiding methods.First,the modified identifier of the "document.xml" file is replaced to embed secret information as needed.The information hiding method based on the modified identifier is mainly to achieve detection and location of tampering.Then,a new element is constructed in the constructed "hidden" tag to add the secret information.Finally,the redundant attributes are added into the "setting.xml" file to embed secret information again.The latter two methods can improve the robustness of multiple information hiding schemes.The experimental results show that the secret information embedded in the multiple information hiding scheme is invisible and has huge embedding capacity.Through the comparison of triple secret information,tampering can be detected and located effectively.