Verification of Key Establishment Protocols for a Home Health Care System

Abstract

A Body Sensor Network can be used in a home health care system to monitor the elderly or patients with chronic diseases. The security and requirements of the home health care system is complex. We show how genetic design methodology models the requirements of the health care system. In our system, physiological data can be used to establish keys amongst body sensors, where the sensors have no other prior secret. We show how the requirements of the key establishment protocol can be placed into a Requirement Behaviour Tree. A model is generated from the behaviour tree, and a model checker is used to formally verify the protocol within our system. Implementation of the salient features of each of the protocols is provided. The salient features of the protocols were implemented in TinyOS and run on mica2 motes. The time elapsed, complexity of the code, and memory requirements are analysed in detail.