A lightweight security framework for electronic healthcare system.

Electronic healthcare systems (EHS) are the most emerging field of today's digital world which is used for remote health monitoring, evidence-based treatment, disease prediction, modeling, etc. Many internet of things (IoT) devices and body sensors are involved in such systems for data collection. Every time a cloud-based solution is adopted to collect and preserve collected personal health information. Secure data transmission is a big challenge in such an environment as the devices are memory and power-constrained. This research focuses on a lightweight ciphering mechanism that can be used to secure an electronic healthcare system. Traditional cryptographic solutions are not suitable due to the operational complexity. Some popular lightweight block ciphers which includes SIMON, HEIGHT, LEA, etc. are used in IoT device to increase the speed. Hence, in this paper, we have proposed a lightweight security framework with a flexible key structure to protect the data in the electronic healthcare system. The proposed scheme increases the speed by minimum 4 $\%$ with compared to existing literature. Our experimental analysis shows that the proposed technique also have a low computational and communicational load. The brief security analysis using automated validation of internet security protocols and applications (AVISPA) tool shows that the proposed scheme can withstand all network attacks.