Digital Image Encryption Algorithm Based on Chaotic Block and Pixel Mapping Table

In this paper, we propose a new image encryption algorithm that depends on changing the pixels value and on the shuffling approach of the image. Our algorithm used two chaotic functions to encrypt the image. First, the Rossler chaotic function to create a linear independence between random chaotic blocks and to shuffle the image, where the second chaotic function is a logistic map to create PMT to change the pixels value after creating the liner independence relationship between the blocks to increase the randomness of the cipher image. However, by analyzing our algorithm, we show that it’s strong against different types of attacks.