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A novel bit-level image encryption algorithm based on 2D-LICM hyperchaotic map
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DOI：10.1016/j.sigpro.2017.08.020.png)
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Abstract
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In this paper, a new two-dimensional Logistic ICMIC cascade map (2D-LICM) is proposed based on cascade modulation couple (CMC) model. Performance evaluations show that it has hyperchaotic behavior, wide chaotic range and large complexity. Based on this map, a novel image encryption algorithm is designed by employing bit-level permutation and diffusion simultaneously. The bit-level permutation is performed by circular shifting, and the bit-level diffusion is carried out by exclusive or (xor) and reverse operations. In addition, the initial values of chaotic system are updated in real time according to the obtained ciphertext and it greatly improves the ability of resisting known plaintext attack and chosen plaintext attack. Simulation results and performance analysis show that this algorithm has good encryption effect and high efficiency. It can resist typical attacks including statistical, brute-force, differential attacks and so forth. (C) 2017 Elsevier B.V. All rights reserved.
Keywords:
Chaos
Image encryption
2D-LICM hyperchaotic map
Bit-level encryption
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