关键词: 普适计算, 信任, 概率理论, 可信度方法

Abstract: According to the traits of trust in pervasive computing and the shortages of the existing trust model, a probability and credibility-based trust model was given. Considering the subjective and objective factors, the trust was acquired by subjective trust, directive trust and recommendatory trust. Based on the credibility-based matching degree algorithm, the entities falling short of recommendatory condition were excluded before calculation. And combining the update of recommendatory chain, the problem of vicious recommendation was solved. The trust was more credible.

Key words: pervasive computing, trust, probability theory, credibility theory