普适计算的信任计算模型

信任和安全有紧密的联系,当前的安全技术都隐含地与信任相关.普适计算环境是一个开放的环境,相互合作的主体具有自发性和不可预知性.在互相不知道的主体之间进行交互,必须有足够级的信任.普适计算比传统计算更强调信任的作用.本文在分析普适计算的信任特征后给出了适合该环境的信任计算模型.证明了普适计算环境中的信任关系是偏序关系,根据信任Hasse图,我们给出了信任评估机制.最后分析表明该模型满足Lamsal的普适计算信任建模要求.

Trust Computing Model for Pervasive Computing

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.