Secure Medical Image Encryption Using Modified Logistic Map

Abstract

Secure transmission of medical images ensures that sensitive patient data, namely X-rays, or CT scans, is protected during transfer between healthcare providers. This process often involves encryption techniques to prevent unauthorized access and ensure confidentiality. This work presents a chaos based medical image encryption algorithm.  Permutation and diffusion are the two main component of any encryption technique. In this work, permutation is carried out using the sequence produced by the modified map. To improve the security two levels of diffusion namely row diffusion and column diffusion is carried out. The performance of the proposed algorithm is verified using the various metrices like entropy, Histogram analysis, NPCR, UACI, Chi square value, key space etc. Simulation results show that the proposed algorithm is resistant to various attacks.