The International Workshop on Cyber-Physical Systems Security (CPS-Sec) will be held in Marina Del Rey, California, USA in conjunction with the 10th IEEE International Conference on Distributed Computing in Sensor Systems (DCOSS 2014) between 25-27 May 2014. The CPS-Sec workshop will focus on timely and emerging topics that pertain to security of cyber-physical systems. Any application area for CPS, including the security of embedded systems, Internet of Things, SCADA Systems, Smart-Grid Systems, Critical Infrastructure Networks, Transportation Systems, Medical Devices are all welcome. ​