Design of policy language expression in SIoT

The proposal of Social Internet of Thing (SIoT) creates interesting opportunity for things to establish social relationships among themselves. In this paper, we believe that policy management service is an efficient and flexible solution to the management of resource interactive scenarios and access control scenarios in SIoT. This paper firstly provides a survey on several general policy languages and evaluates them with three key requirements for the performance evaluation under the SIoT scene. Then, we select Ponder as our policy language and design a policy editing syntax for our typical SIoT scene to avoid complex Ponder syntax training for users without professional knowledge in policy field. Finally, we implement an IoT policy editor and conduct an experiment to compare our policy editing syntax and Ponder syntax. Test shows that editing through our policy editor can decrease error-rate considerably comparing with that by using Ponder syntax.