Key establishment protocol for a patient monitoring system based on PUF and PKG

A body sensor network (BSN) is wireless network over a person´s body that can monitor their physiological functions. In the health area, the security of the transmitted information is of vital importance to the attention of a patient. One of the major problems for a monitoring application is the key establishment between the diverse entities in these systems. The generation of cryptographic keys using physiological functions can provide security communication in a BSN as an intra-BAN. The addition of Physically Unclonable Functions (PUF´s) extends security to the destination information in the medical center placed beyond-BAN. This paper presents a new protocol using both technologies to establish a cryptographic key and provide security at different levels of communication. An implementation of our protocol is presented as a proof-of-concept in order to test the architecture.