Research into Color Image Encryption Algorithm Based on DNA Coding and Integer Chaos
Digital images have the characteristics of strong correlation between adjacent pixels and high redundancy.Breaking the correlation between adjacent pixels of digital image and improving the cipher text images and keys are the hot topic of image encryption schemes at present.To solve the above problems,this paper designs an image encryption scheme based on Tent mapping and DNA coding.In this scheme,Arnold mapping and Zagzig transform are firstly used to scramble the image twice to break the correlation between adjacent pixels of the clear text image.Secondly,the scrambled image is encrypted by using the pseudo-random sequence generated by two-dimensional integer Tent mapping.There are eight kinds of DNA coding rules.The pseudo-random sequence generated by Tent mapping is used as the parameter to select the DNA coding rules and finally the ciphertext image is formed.From the aspects of histogram and information entropy,etc.,the re-sults show that the scheme has strong cryptographic characteristics and high security.
万方数据
维普
