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AN IMAGE ENCRYPTION USING BIT LEVEL PERMUTATION AND DEPENDENT DIFFUSION

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Author(s): G.S. Nandeesh | P.A. Vijaya | M.V. Sathyanarayana

Journal: International Journal of Computer Science and Mobile Computing
ISSN 2320-088X

Volume: 2;
Issue: 5;
Start page: 145;
Date: 2013;
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Keywords: Encryption | image | Bit level permutation | confusion | Chaos | Cryptography | Image encryption | information security

ABSTRACT
Chaos-based cryptosystems have been studied extensively due to their superior properties insecurity 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: thearchitecture is not sensitive to changes in the plain-image and they are insecure upon chosen/known plainimageattack. Due to the favourable properties of bit-level permutation, we propose a bit-level confusion anddependent diffusion to enhance the security of the cryptosystem and to reduce the computation redundancyin traditional architectures. Simulations have been carried out and the results demonstrate the superiorsecurity and high efficiency of the proposed scheme.
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