Abstract: A new architecture of trusted smart space based on SOA (Service Oriented Architecture) was proposed for the security requirement of pervasive computing and implicit interaction. This new architecture can provide scalable information services by using SOA,and support trusted and invisible interaction by adopting a mix-access control based on actor, policy, context, and turst/risk evaluation. Finally, a prototype application was built upon Web service platform,which validated the architecture successfullly.

Key words: Smart space,System software,SOA,Trusted computing