Cyber Physical Systems (SCPS) are Network-centric, dynamic, large-scale super systems with service-oriented architecture of distributed collaborating services stringent simultaneous QoS demands, e.g., "never die," time-critical, secure. SCPS is highly diverse, complex, integrated & autonomous application domains. With access to the heterogeneous mobile networks, security of such cross platform large system is largely unexplored. In this project, we will study the mechanism of Secure Cross-platform Cyber Physical Systems (SCPS). Our objectives are to highlight the core design dimensions of SCPS with co-designs of heterogeneous networks (e.g., 3G, WiFi and WiMAX)/devices (smart-phone, sensors etc) to against attacks to such system.