Toward Modeling Sensor Node Security Using Task-Role Based Access Control with TinySec

There is a TinySec in TinyOS to provide integrity and confidentiality in Wireless Sensor Network (WSN). However, the TinySec is operated based on simple group key management; this is not enough to ensure sensor node security. Accordingly, we propose a new access control methodology using Task-Role Based Access Control (T-RBAC) which has been successfully applied to many different kinds of security applications and has capability to provide flexible authentication and authorization framework to the system. We present the design and implementation results on Wireless Sensor and Actor Networks (WSAN), and security analysis and comparison results show the feasibility of our approach.