Mie Takahashi

Integrating presence inference into trust management for ubiquitous systems

We propose a new architecture for trust management in ubiquitous environments that deals with RBAC policy, digital signatures, and user presence in a uniform framework. The proposed architecture includes inferences about user presence from incomplete sensor signals based on the hidden Markov model. We implemented a prototype system for a connection service in an office computer network with an RFID tag sensor system.Experimental results show that the proposed architecture is effective in providing both useful and secure services in a ubiquitous environment.