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Developing a Secure Soldier Monitoring System using Internet of Things and Blockchain

Currently, a state's army is considered a vital tool for its security. Therefore, tracking and monitoring the health and position of a soldier becomes necessary to ensure their safety. In recent years, a lot of technological advances happen in the field of sensors. One of the popular areas utilizing sensors is developing human healthcare system to monitor vital body signals. The network of such sensors that are used to monitor vital human signal for health care is called Body Sensor Network (BSN). Similarly, a small GPS module can be used to track a person's location. In this paper, we describe a system comprising of a sensor module to be mounted on a soldier's arm for real-time health and position monitoring, which transmits and stores a soldier's data in an encrypted form in a BlockChain; thus making the data tamper proof and distributed. The mounted sensor module consists of a temperature, heart-rate, and GPS module, with 1.15%, 11.1% relative errors in the sensors respectively and 1.62 m, 2.05 m deviation in latitude and longitude of the GPS module in their readings compared against commercial devices. The BlockChain will exist on army controlled computers.