Research On Hyperchaotic Image Encryption Algorithm Based On Block Cipher And RNA Coding

In the context of the continuous iteration of innovative technologies such as big data,cloud computing,and 5G,massive digital image information is disseminated through the Internet and other communication networks in various forms.Because this direction has broad prospects both in academic and applied aspects.The application of block ciphers and chaotic systems has long entered the research field of image encryption,but with the continuous development of decryption methods,it is difficult to ensure the security of image data information by simply using one of the algorithms for encryption.An image encryption scheme based on an encryption algorithm and an encryption algorithm has been proposed,but there are few color digital image encryption schemes that take into account the characteristics of hyperchaotic systems and the application of block ciphers.Therefore,based on the research of two-dimensional discrete hyperchaotic systems and block ciphers,this paper proposes two different hyperchaotic color digital image encryption algorithms based on improved Arnold transform and RNA coding.Characteristic testing and security analysis of the encryption algorithm.The first algorithm is a hyper-chaotic color image encryption algorithm that combines AES encryption and improved Arnold transform.First,a new type of two-dimensional hyper-chaotic system is constructed on the basis of the commonly used two-dimensional chaotic system,and its good performance is proved by NIST and other tests.Chaos performance,and then complete the design of the overall encryption algorithm by applying and inputting the corresponding steps of the AES encryption algorithm with the designed chaos key and the image data after scrambled operation using the improved Arnold transform.Finally,various security tests are carried out on the image encrypted by this algorithm,which proves the security of the encryption algorithm.In order to further improve the security of the second encryption algorithm,a hyper-chaotic system with better chaotic characteristics is constructed on the basis of the first two-dimensional discrete hyper-chaotic system,and then a new algorithm is optimized in terms of chaotic key generation.Finally,the design of the new encryption algorithm is completed by applying the new RNA coding calculation rules to further encrypt the data of the three channels of the color digital image.The designed encryption algorithm has better security and effectiveness.The two image encryption algorithms proposed in this paper not only take into account the characteristics of hyperchaotic systems,but also apply AES block encryption reasonably.They are not only suitable for grayscale digital image encryption,but also color digital image encryption.They have good adaptability and wide range of applications.applicability.