The role of blockchain and IoT in recruiting participants for digital clinical trials

Our personal data is now more valuable than ever. The uncontrolled growth of internet-centered services has led us to accept many compromises about how we share it. In the era of Internet of Things, personal data is collected continuously. Now, more than ever, we are in need of privacy-preserving applications where users always retain control of their personal data. In this paper, we present a secure way to control the flow of personal data in the specific case of the recruitment of participants for clinical trials. We take special care to protect the interests of both parties: the individual can keep its data private until an agreement is reached, and the Clinical Research Institute can be assured that it is acquiring useful and authentic data. We provide a proof-of-concept implementation and study its performance based on a real-world evaluation.