A fast hybrid image cryptosystem based on random generator and modified logistic map

摘要

This paper demonstrates an image encryption technique using a hybrid method. This method consists of two stages. The image is XORed with the Pseudo-Random Number Generator (PRNG) in the first stage. The confusion and diffusion processes are applied by using the Logistic map and its' three modifications in the second stage. The original Logistic map has a small range of key-space. The three modifications of Logistic map increased key-space range due to expanding the range of the original Logistic map parameter. Multiple tests have been performed on the hybrid method such as security analysis and encryption quality. The hybrid method presented a good evaluation.