IMAGE ENCRYPTION USING CONVOLUTION OPERATION: A REVIEW PAPER

Abstract

This paper introduces a new image encryption algorithm based on the operation of convolution. Several pseudo-random sequences are generated by Chen's chaotic method and general convolution operation using an external key of 300 bits in length, and then their statistical properties are checked. The proposed image encryption scheme contains one operation coverage module, two operation diffusion modules, and one operation uncertainty module. The covering module uses a pseudo-random sequence to cover a binary XOR operation of the original plain image. The diffusion modules are based on the multiplication of the GF finite field (28) and the windowed convolution with the summation of modulus 256, and on the dissemination to all the pixels of the diffused image of the information of any pixel in the original image. Each pseudo-random sequence value is used by the confusion module as the offset address of the pixel replacement to permit the scattered image. The simulation experiment and comparative analysis show that the image cryptosystem proposed has the advantages of fast processing speed, good sensitivity, and high strength of encryption, and can be used as a functional image cryptosystem candidate.