An Image Encryption Scheme Based on Modified Logistic Map

In order to improve the security of chaotic encryption algorithm, a modified chaotic map, which is based on the Logistic map, is proposed in this paper. Compared with original logistic map, the proposed map makes it always be chaotic, and expands the iteration range from original (0, 1) to (0, 4λ) (λ>;0.25). We designed an encryption scheme based on the proposed map for implementing image encryption. Some simulation results show that the modified Logistic map possesses bigger key space, faster sequence generation rate and faster encryption speed compared with the original logistic map.