Image Encryption Algorithm Based On Chaotic Neural Network

With the emergence and rapid development of the technique of computer andinternet,people attach more and more attention to the modern internet security.Performance of encryption especially the image encryption is the basic securitytechnique of the internet,which is mainly through the information of internet toguarantee the security of the internet. The issue of the internet security has alreadybeen the most important part of the internet research,while the cryptography is thecrucial technique of the information security.Since the characteristic of the highly non-linear of neural network coincide with thecharacteristic of cryptography,which made it possible to application in cryptography.The research of its application in cryptology has been a new and important directionin this field.Use neural network to construct a new cryptographic system.The emphasis of this paper is to research the symmetric image encryption based onneural network. Chaotic sequences and track to realize the encryption algorithm.Compared with the sequence encryption based on LFSR,it is superior to periodicsequence random sequence and linear complexity. In addition, its fast speed can meetcommunication requirements.The first purpose of this paper is to find out a appropriate solution to realize theimage encryption. Using the characteristic of feedback structure of the Hopfieldneural network,we can put the information to be stored on the systemic attractors,anduse chaotic attractor of neural network to encrypt. Use the internet to imagine thestored information automatically.The input of Hopfield internet if the LFSR sequence,after the changing of non-linear of the internet,the output of the random number can meet the basic requireof the cryptography.The second research purpose is to test the performance of random sequence. Thecontent of the test is as following.The analysis of security based on feedback technique and compound chaoticequation cryptography technique.1)The analysis of secret key space.2)The random test of NIST SP800-22.The third research purpose is to test different kinds of indicator.