Securing Medical Images and Patient Data using Non-Linear Sequences

Abstract

Hiding of patient data in medical image along with image encryption is a growing research area. The use of chaos in image watermarking and image encryption algorithms has seen tremendous advantages. In this paper a chaos-based image watermarking to provide authentication and chaos based watermarked image encryption algorithm to provide security is presented. The performance of the image watermarking and encryption is mainly based on the chaotic logistic map equation. In order for a complex imaging system to cope with these concerns, a cryptography algorithm able to manage the vast amounts of data involved in image processing is required. This paper proposes a new image watermarked encryption method using one-dimensional chaotic map namely Logistic map equation. Using this algorithm, the key space is enlarged to 2212 to improve the security against exhaustive attacks, and also a good encryption speed can be achieved. The results of the proposed method show that it is more efficient interms of key space, entropy and key sensitivity properties.