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A robust medical image encryption in dual domain: chaos-DNA-IWT combined approach

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Abstract

Today’s technological era, the booming desire for e-healthcare has inflated the attention towards the security of data from cyber attacks. As the digital medical images are transferred over the public network, there is a demand to shield an adequate level of protection. One of the prominent techniques is encryption which secures the medical images. This paper recommends a DICOM image encryption based upon chaotic attractors on frequency domain by integer wavelet transform (IWT) and fused with deoxyribonucleic acid (DNA) sequence on the spatial domain. The proposed algorithm uses a chaotic 3D Lorenz attractor and logistic map to generate pseudo-random keys for encryption. The algorithm involves subsequent stages, i.e. permutation, substitution, encoding, complementary and decoding. To endorse the resistance of the proposed algorithm, various analyses have been examined for 256 × 256 DICOM images by achieving an average entropy of 7.99, larger keyspace of 10238 and non-zero correlation. The overall results confirm that the proposed algorithm is robust against the brute force attacks.

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Acknowledgments

The authors thank the Department of Science & Technology, New Delhi, for the FIST funding (SR/FST/ET-II/2018/221). Also, the authors wish to thank the Intrusion Detection Lab at the School of Electrical & Electronics Engineering, SASTRA Deemed University for providing infrastructural support to carry out this research work.

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  1. School of Electrical & Electronics Engineering, SASTRA Deemed University, Thanjavur, 613 401, India

    Aashiq Banu S & Rengarajan Amirtharajan

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  1. Aashiq Banu S
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Correspondence to Rengarajan Amirtharajan.

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Banu S, A., Amirtharajan, R. A robust medical image encryption in dual domain: chaos-DNA-IWT combined approach. Med Biol Eng Comput 58, 1445–1458 (2020). https://doi.org/10.1007/s11517-020-02178-w

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