MA/MF MAC Protocol for Industrial Wireless Network and Performance Analysis

Privacy protection is one of the important topics in network security. Although a lot of work has been done, there are still some open issues and challenges that need to be addressed. Now, open and dynamic computing environments offer flexible and convenient sharing of information and services for users. Consequently, there exist a lot of different policies for privacy protection to deal with dynamic changes in each application scenario. This raises the issue of privacy policy specification. Although trust can help protect user privacy, the use of unified trust values or a simple trust rank cannot satisfy the requirement for privacy protection because different privacy may need its own trust evidence for the evaluation of trust. To solve this problem, we propose a novel approach for privacy protection based-on ontology in this paper. Our main contributions in this paper include (1) specifying privacy policies in a semantic way and (2) abstracting the policies as trust attributes for privacy ontology. In addition, our method can be used to protect sensitive policies at the same time.