Color Medical Image Encryption Using Two-Dimensional Chaotic Map and C-MLCA

Abstract

In this paper, we propose a new color medical image encryption method using two-dimensional chaotic map and C-MLCA. The two-dimensional chaotic map is a structure with self-preserving properties, which moves the position of the pixel and encrypts the image. C-MLCA uses a maximum length PN sequence based on the properties of CA. The sequences with unpredictably complex rules create a basis image and the basis image is XOR-computed with the original image. That is, C-MLCA encrypts the image by changing the eigenvalues of the pixels through the computation process. Using these two features, we introduce an effective encryption method to overcome the limitations of the existing encryption methods. By comparing and analyzing the encrypted image with the original image, we were able to confirm that the proposed encryption method has a high level of stability and security.