Abstract: A cloud computing is one of the upgrading technology, it provide the data access mechanism through cloud provider. User can accomplish a useful and economical advance for information sharing between group members in the cloud. Cyber thread is one of the critical factors in cloud computing. To provide a safe transaction network faces the many issues. The safety critical systems that need to provide a high-level of confidence in their safety and functionalities under multiple operating in network. With the support of the SDN network play a major role. According to the cyber threads, cyber-physical systems testbed based on cloud computing and Software Defined Network (SDN) were used. And Cyber physical Monitoring System is proposed to monitor the attacks.
Keywords: Cloud Computing, Cyber thread, Security, SDN and Attack monitoring.