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A chaotic framework and its application in image encryption

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Abstract

A novel image encryption framework is proposed in this article. A new chaotic map and a pseudorandom bit generator are proposed. Apart from this, a novel image encryption system is designed based on the proposed map and the proposed pseudorandom bit generator. These three are the major contributions of this work that makes a complete cryptosystem. The proposed new chaotic map is proposed which will be known as the ‘RCM map’ and its chaotic property is studied based on Devaney’s theory. The proposed pseudorandom bit generator is tested using the NIST test suite. The proposed method is simple to implement and does not involve any highly complex operations. Moreover, the proposed method is completely lossless, and therefore cent percent of data can be recovered from the encrypted image. The decryption process is also simple to implement i.e. just reverse of the encryption procedure. A scrambling algorithm is also proposed to further enhance the security of the overall system. The simulation, detailed analysis, and comparative studies of the proposed overall image encryption framework will help to understand the strengths and weaknesses of it. The experimental results are very promising and show the prospects of chaos theory and its usage in the field of data security.

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  1. Department of Computer Science & Engineering, University of Kalyani, Kalyani, India

    Mousomi Roy, Shouvik Chakraborty & Kalyani Mali

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  1. Mousomi Roy
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  2. Shouvik Chakraborty
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Correspondence to Shouvik Chakraborty.

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Roy, M., Chakraborty, S. & Mali, K. A chaotic framework and its application in image encryption. Multimed Tools Appl 80, 24069–24110 (2021). https://doi.org/10.1007/s11042-021-10839-7

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