Chaos-based image encryption using an AONT mode of operation

Chaos-based cryptography is a promising and emerging field that offers a large variety of techniques particularly suitable for applications such as image encryption. The fundamental characteristics of chaotic systems are closely related to the properties of a strong cryptosystem. Most research on chaos-based encryption does not concentrate on the aspect of encryption modes of operation. This paper introduces a new chaos-based image encryption scheme using an all-or-nothing transform (AONT) mode of operation. This results in a novel non-separable chaos-based mode which we have implemented and evaluated. Our results show that the AONT mode achieves a security gain with little overhead on the overall efficiency of the encryption.