Research Of Coverless Information Hiding Algorithm

Today,as the form of cyberspace security being more and more urgent,information hiding technology has become an important research field for information security sharing and transmission.This technique hides the secret in a carrier in some form for transmission in a manner that does not attract the attention of a third party.Information hiding technology has been widely used in the fields of multimedia,communication,and confidentiality.The traditional information hiding technology usually achieves the purpose of hiding information by modifying the carrier.We regard the information hiding in this way as embedded information hiding.However,with the development of embedded information hiding technology,various steganalysis schemes for this technology are also emerging,because embedded information hiding inevitably leaves traces of modification on the carrier,leaving a security risk that secret information is effectively detected.In the current situation,a"non-embedded"information hiding technology has been proposed in recent years.This technique no longer modifies the carrier and is therefore referred to as an coverless information hiding technique.According to the difference of technical ideas,the coverless information hiding can be divided into semi-constructive and complete constructive categories.The former refers to selecting a specific carrier type and the carrier is driven by secret information to generate.The latter is to map some secret information and carriers.So far,coverless information hiding research results are few,and there are many problems,such as hidden capacity is too small,security is flawed,and the invisibility of secret information is poor.After in-depth study of multiple schemes in the field of coverless information hiding,this paper did the following work:Firstly,in the semi-constructive information hiding classification,an improved texture synthesis coverless information hiding scheme is proposed.The traditional information hiding scheme based on texture synthesis has the disadvantage of small hidden capacity,too much texture seam,and security vulnerability.Based on the texture synthesis information hiding scheme proposed by Wu et al.,this paper combines a quasi-affine transformation on limited integer grids?QATLIG?transform which has the large transform cycle.It places the interference block and mixes it with the normal block with information hidden to achieve the purpose of interfering with the attacker.In this paper,a detailed experiment was carried out to verify the proposed scheme,including safety experiments,synthetic image quality analysis,and hidden capacity analysis.Result shows that the scheme maintains the texture image quality generated by Wu et al.,and the information hiding capacity loss is extremely small?about 1.46%-7.11%?.The probability of hidden information being violently cracked is extremely low(far less than 10^-5),can effectively resist the attack scheme of paper[35].Secondly,in the complete constructive information hiding classification,an improved SIFT-based coverless information hiding scheme is proposed.The program which is optimized and improved is based on the Zheng S et al's scheme.Specific optimizations include hash coding,inverted indexing and database information properties.The improvement of security is mainly for the processing of additional image.In the Zheng S et al.'s scheme,the processing of additional image selects the most common LSB information hiding technology,which brings security risks to the whole scheme.This paper chooses an ELBP-based LSB technology to replace it to improve the security of the entire solution.Finally,we carried out experiments and analysis on both the hidden capacity and security of the entire solution.Thirdly,on the basis of analyzing many papers,we summarize the existing problems and forecast the future research directions of coverless information hiding.