Trust Computing Model for Pervasive Computing
普适计算的信任计算模型

There exists a close relationship between trust and security. Current security techniques are involved implicit- ly in trust. Pervasive computing environment is an open environment in which principals collaborate spontaneously and unforeseeably. High enough trust is essential to ensure security among these principals in which pervasive computing pays more attention to the role of trust than traditional computing. In this paper, after analyzing the characteristics of pervasive computing, we present a formal trust computing model. Meanwhile, we prove that trust relationship in perva- sive computing is partial ordering and the approach to evaluate combination trust value is studied based on trust Hasse diagram. In the end, the analysis makes clear that the trust model proposed in this paper can meet Lamsal's trust mod- eling requirement of pervasive computing.