Research On Text Steganography Adapted To Instant Communication

The rapid development of the network has resulted in the diversification of carriers,and the communication mode is changed from letters to the E-mail and instant communication.However,the transmission of messages based on the public communication network also brings risks,such as message leakage.Although encryption scrambles content and that makes third parties cannot know accurate content,but encryption cannot make a secret information disappear.Information hiding technology is designed to hide the existence of a communication,and therefore it has attracted people's attention.It also can be applied to such carriers as images,audio,video,and texts,because text applications are the most common carrier.So this article will focus on text hiding research.Aiming at the existing text steganography methods,there are more or less format anomalies and semantic anomalies.Combined with the linguistic features of instant message,this paper proposes three text steganography methods based on character features that are suitable for instant message.These methods comprehensively consider concealment,capacity,availability,and other factors,and they are designed based on the principle of overall optimization.The specific work is as follows:· Analyze and verify characteristics of strokes in Chinese characters.Firstly,the probability of distribution is calculated from the perspective of probability,and textual statistical experiments are used to verify its availability.· A coverless text steganography method based on character features is proposed.The basic idea of the steganography algorithm is: find universal character features and establish a mapping relationship with the binary "0" or "1",and search in the network.In this paper,the character feature of the parity of Chinese characters strokes is taken as an example for discussion.The results show that this method need not send any additional information,and the information embedded rate is high.· A text hiding method based on the combination of character features and synonym substitution is proposed.The binary bits of secret information are represented by character features,and the position information is replaced by synonyms.The results show that this method has better reliability,and at the same time,the security of steganography can be effectively realized by selecting and changing character features.This method is flexible and has some improvement in concealment.It can be combined with instant messaging and the designed dialogue has a large hidden capacity.· An interactive text steganography model for sending and receiving parties is designed.The model can be effectively integrated with instant messaging.Secret information is segmented and serialized,and information can be exchanged through real-time confirmation of each segment.Instant communication can dynamically and secretly send secret information through different carriers to implement multi-carrier steganography.In summary,this paper focuses on the method of text steganography that adapts to instant messaging,and verifies the usability of character feature(the parity of Chinese characters stroke' number),and specifically proposes three steganography methods.