@InProceedings{A_Policy_and_Trust_Driven_Framework_for_Securing_Cyber_Physical_Systems, author = "Anupam Joshi, Yelena Yesha, Tim Finin, Wenjia Li, and Palanivel Andiappan Kodeswaran", title = "{A Policy and Trust Driven Framework for Securing Cyber Physical Systems}", month = "July", year = "2009", booktitle = "Workshop on Future Directions in Cyber-physical Systems Security", }