A novel chaos map based medical image encryption scheme

ABSTRACT

In the medical industry, digital images are frequently used to diagnose a variety of diseases. These images comprise of lot of secret information regarding health of the patient. Image encryption is used to protect this secret information by changing the image into unrecognizable form. This research paper proposes a novel chaos map and a pseudo random key. The method comprises of three phases to encrypt the medical images. Firstly, a novel pseudorandom key is generated using the XOR operations and left rotate operations. Secondly, a novel chaos map is created using the cosine and sine function. Finally, pseudorandom key and chaos map are used to construct the cipher image. The novel chaotic map's robustness has been assessed according to the Shannon Entropy, Lyapunov Exponent, and Bifurcation Diagram. The proposed mathematically transformed hybrid chaos map provides a wider chaotic range and shows more complex behavior than the various existing chaotic maps.

KEYWORDS:

• PSNR
• differential attack
• Sine-Cosine chaotic map
• entropy
• medical encryption
• security
• cryptography
• encryption

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Atul Kumar

Atul Kumar is presently working as research scholar in Department of Computer Engineering at National Institute of Technology, Kurukshetra, India. He received master degree from NIT, Kurukshetra in 2019. His research interest includes RFID, IoT, Cryptography, Security.

Mohit Dua

Mohit Dua received Ph.D. in the area of Automatic Speech Recognition from National Institute of Technology, Kurukshetra, India in 2018. He is presently working as Assistant Professor in Department of Computer Engineering at NIT Kurukshetra, India. He has more than 17 years of Teaching and Research experience. He is a member of Institute of Electrical and Electronics Engineers (IEEE), and life member of Computer Society of India (CSI) and Indian Society for Technical Education (ISTE). His research interests include Speech processing, Chaos based Cryptography, Information Security, Theory of Formal languages, Statistical modelling and Natural Language Processing. He has published approximately 60 research papers including abroad paper presentations including USA, Canada, Australia, Singapore, Mauritius and Dubai.