Research And Implementation Of Information Hiding Technology For Web Documents

With the rapid development of the Internet,the network transmission of documents has become very popular,and the information hiding technology based on network documents has become a current research hotspot.Most of the current researches on information hiding technology take images,audio and video as carriers.Compared with images,videos,and audios,text documents contain less information redundancy,so it is more difficult to embed hidden technology with text as a carrier,and there are few research results.In view of this,this paper studies the information hiding technology of network documents.The main work of the thesis has the following aspects:1.Implemented an information hiding system based on document structure.The algorithm uses the line spacing and word spacing of the document structure to hide information.This paper designs the framework of the information hiding system based on the algorithm principle,and solves the problems of document content extraction,Word document and digital image format conversion,and line spacing and word spacing adjustment involved in the information hiding process.Finally,C#is used to implement the information encoding algorithm based on the document structure,and the performance of the hidden system is analyzed through experiments.2.Propose a text information hiding algorithm based on font conversion.Aiming at the shortcomings of poor hiding transparency and low embedding capacity in the information hiding method based on document structure,through studying the font structure of Chinese characters,a text information hiding algorithm based on font conversion is proposed based on the deep learning method.The algorithm uses different representations of Chinese fonts to embed information.At the same time,in order to ensure the transparency of the embedding effect,deep learning methods are combined with style transfer ideas to generate fonts.3.Design and implement a text information hiding system based on font conversion.According to the proposed information hiding algorithm based on font conversion,the overall design of the hidden system was completed.The font generation model and the font recognition model were completed through training.Finally,the system was programmed using the Django framework.The system is mainly divided into two functional modules:information hiding and information extraction.The information hiding module receives the text document image and the text TXT containing the hidden information,and then replaces the document font according to the embedding algorithm to achieve information hiding;the information extraction module receives the text image to be extracted,then obtains the hidden information according to the extraction algorithm,and finally provides Contains download links for information files.The text information hiding system based on font conversion proposed in this paper can greatly increase the information hiding capacity,enhance the embedding transparency,and the algorithm is also very robust.The application scenarios are more extensive.