Abstract
Access control technologies are fundamental for addressing the security and privacy requirements of the Internet of Things (IoT). This paper proposes an access control solution for Constrained Application Protocol (CoAP)-based IoT services. The proposed solution considers a network of a single provider that interconnects various IoT endpoints. It leverages the Software-Defined Networking (SDN) paradigm and implements application aware policy enforcement at the network level. All operations are transparent to the IoT endpoints and no modifications are required to the IoT communication protocol. Furthermore, our solution is built on standard OpenFlow, hence it is realistic and it can be easily deployed to an existing network. We prove the feasibility of our solution through a proof of concept implementation using network emulation.