부산대학교 도서관

Data security is essential to the e-healthcare industry for protecting patients' confidential information. It is necessary to continuously monitor the patient's health to give them the proper medical care. The proposed work develops a Raspberry Pi cryptosystem by sending real-time patient health data to the physician via the Thing Speak cloud environment. In order to create the highly random keys for encrypting the color medical images and sensor data (temperature, heartbeat, medical images), this research uses numerous chaotic maps in a single procedure. Firstly, the shuffling algorithm based on a logistic map is designed to shuffle the image pixels randomly. Then, the diffusion algorithm based on circle map is developed to diffuse the shuffled image pixels. The effectiveness of the proposed algorithm is analysed based on MSE (Mean Squared Error), PSNR (Peak Signal-to-Noise), Entropy, Histogram, and correlation is calculated analyses.