Implementation of the universal physical access control system (UPACS)

The Universal Physical Access Control System (UPACS) is a communication protocol designed to provide secure access to remote physical devices over untrusted communication networks, where it could be subjected to eavesdropping, unauthorized modification of its messages, and other forms of tampering by attackers. We created a reference implementation of the UPACS protocol and performed a security analysis designed to determine the protocol's resilience to several known forms of security attack. Our implementation prevented several attempted security attacks, including Privilege Elevation Attacks and unauthorized registration, addition and deletion of physical device controller nodes.