University of New South Wales
Growing pressures on healthcare costs are spurring development of lightweight body-worn sensors for real-time and continuous physiological monitoring. Data from these sensors is streamed wirelessly to a handheld device such as a mobile phone, and then archived over the Internet at a central database. Authenticating the data is vital to ensure proper diagnosis, traceability, and validation of claims. Digital signatures at the packet-level are too resource-intensive for body-worn devices, while block-level signatures are not robust to loss. In this paper, the authors propose, analyze, and validate a practical, lightweight robust authentication scheme suitable for health-monitoring.