Authorization-sensitive image encryption based on moving shuffling in bit-level via using novel fuzzy hyperchaotic systems

This paper presents an authorization-sensitive image encryption algorithm in bit level, which is applied by moving a selected pixel window through the whole image. Multi-level encryption scheme covered with two hyper-chaotic systems combining with one logistic map, are further developed in the encryption algorithm to confuse the relationship between plain image and cipher image. Initial conditions for shuffling and confusing stages are generated by the proposed authorization system after being provided by the user at the beginning of the process. In addition, the data given in the authorization system is encoded into The RFC 4648 base 32 alphabet and then mixed to generate the necessary information before operating the encryption process. Results of several experiments show that this novel image encryption algorithm has an effective encryption performance as well as a high level of security.