The modeling and analysis of Critical (Informational) Infrastructure Protection (CIIP or CIP) is a relatively new and important field of study. Major countries have developed simulation tools to assess their CIIP performance. Taiwan should also establish its own capability in CIIP evaluation. In the meantime, a common platform to simulate different protection targets is desirable. This paper describes a proposed platform for simulation and analysis of CIIP. We defined a process along with common components to modularize CIIP simulation tools so as to simplify their development. We have applied this approach to the implementation of a simulator for physical infrastructure protection and a simulator for critical materials transportation, along with the on-going implementation of a simulator for interdependency analysis. These simulators can simulate potential combinations of attack scenarios and compute the probabilities of successful defense. By comparing different scenarios, we can identify vulnerabilities of the examined CIIP, and then improvement can be designed.