Research On Coverless Information Hiding Based On Keyword

Information hiding is an important research direction in the field of Cyberspace Security.Information hiding technology embed the secret information into the normal information carrier without destroying the carrier itself,so that the attacker is not aware of it and completes information transmission.Because most of the existing information hiding technology.will embed the secret information into the information carrier,these methods are difficult to resist all kinds of steganalysis.To solve the problem,a text coverless information hiding method based on the keyword is proposed in this paper.This method use appropriate natural text from internet as the information carrier without any modification directly.At the same time,in order to ensure that the secret information receiver can extract the hidden information from the natural text,a tag is selected according to the identity feature of the receiver to assist extraction.The specific work of this article is as follows:1)The paper proposes a text coverless information hiding method based on the keyword.This method uses the Chinese character mathematics expression as a tag to assist in locating the position of the keyword in the natural text.A keyword is obtained after the preprocessing of the secret information,and then retrieve the natural text from the internet according to keyword characteristics of the secret information receiver At the last,the natural text is directly used as a carrier to realize the information hiding.The secret information receiver can locate the keyword according to its own characteristics,and they can use the word segmentation to extract the keyword.This method greatly simplifies the process of extracting hidden information of text coverless information hiding.Experiments show that within a certain range of tags,this method can achieve a very high hiding success rate of 98%.2)This paper proposes a text coverless information hiding method based on the tag-keyword model.The method improve the information-hidden capacity of the text coverless information hiding method.In order to improve the hidden capacity this method constructs a binary strings to map the length of the keywords in the natural texts.The binary strings can make each tag locate multiple keywords,and then use the tag to hide the binary string to ensure its anti-detectability.Experiments show that this method can effectively improve the hidden capacity.