Research On Large Capacity Steganography Algorithm Based On Digital Image

With the advent of mobile Internet,human society has entered the stage of rapid development of information,people can download upload a variety of multimedia files through the Internet at any time and in any site.The development of the Internet provides a great convenience to our lives.But,at the same time,it also arises our great concern on the security issues of information.On the one hand,some illegal organizations,terrorists and intelligence personnel use multimedia files to covert communications and engaged in some damage to national security damage.On the other hand,military operations involving military information such as operational programs are also transmitted through the Internet.The enemy can use the network monitoring and mathematical analysis of our intelligence to intercept and destroy the attack,undermine our normal military operations.In addition,in the commercial cooperation of multinational companies,in different regions between the high-level and high-level business secrets are also transmitted through the Internet to ensure that business secrets hidden security is a very important thing.Therefore,how to carry out safe secret communication becomes a big research hotspot.Cryptography is an important means of traditional communication encryption.It encrypts the secret information through the encryption algorithm,but the encrypted information is manifested as a garbled,which causes the attacker to doubt and leads to the secret information intercepted and cracked.Due to the disadvantage of cryptography,information hiding is proposed as a new information security communication technology.Steganography is one of the important branches of information hiding.There is a lot of redundant information in the digital image,which is a good digital steganography carrier.Therefore,the development of digital image steganography algorithm,has great significance.In this paper,the digital image steganography algorithm,the main work is as follows:(1)This paper proposes a steganographic algorithm that embeds arbitrary binary data into two adjacent pixels.In this paper,through analyzing the advantages and disadvantages of the APPM method and combining the formula method,an FAPPM method is proposed,and the method is analyzed and compared from three aspects:visual effect,embedded capacity and safety.The experimental results show that the FAPPM method is more flexible in the process of information hiding,and the operation process is more simple and convenient.Compared with the FDEMD method,the FAPPM method not only improves the image quality,but also improves the anti-steganalysis ability.(2)This paper presents a L-type three-pixel-based embedded unit,which uses the checkerboard overlay algorithm to encrypt the embedding position of the secret information and the fusion formula method to realize the FTPM steganography algorithm with arbitrary binary data embedding.The experimental results show that the FTPM steganography algorithm has higher security than other steganography algorithms,and the embedded capacity and image quality have been greatly improved.