关键词: 信任 风险 风险信任平衡模型 观点 可信决策

Abstract:

among the various human factors impinging upon making a decision in an uncertain environment, risk and trust are surely crucial ones. It is still an open issue for the relationship between risk and trust. The researchers focus on either trust models or risk assessment methods,hut ignore the other side    of uncertain decision-making. In this paper, we further the study of risk and trust. First, the relationship between risk and trust is thoroughly analyzed in the trust-based decision making process. Second, a risk and trust balancing model is proposed based on subjective logic. In this model, risk and   trust are represented as the risk opinion and the trust opinion, and the importance of transaction is defined, The threshold set and weights are assigne d according to the security policies defined by trustor. Meanwhile, the trust-based decision is made according to the ordering of trust relationships. T he model we propose can be applied in the security models and secure decision-making based on risk and trust.

Key words: trust;risk, risk and trust balancing model;opinion, trust-based decision making