International Journal of Computer Science and Mobile Computing (IJCSMC)
Chaos-based cryptosystems have been studied extensively due to their superior properties in security and complexity. Recently, quite a lot of chaos-based image encryption schemes have been proposed. Most of them adopt the traditional permutation and diffusion operations. The drawbacks are: the architecture is not sensitive to changes in the plain-image and they are insecure upon chosen/known plain image attack. Due to the favorable properties of bit-level permutation, the authors propose a bit-level confusion and dependent diffusion to enhance the security of the cryptosystem and to reduce the computation redundancy in traditional architectures.