At this stage,the process of electronic commerce protocol formal analysis is chaotic; description have low versatility and accuracy, usually has some unreasonable assumptions. This paper presented a model-knowledge and faith model-used modern theory of morden modal logic according to knowledge and faith. The model contained the security environment, knowledge sets, faith sets, capability set, the tangent point and toknowledge. The model put forward a good solution to those problems, could formal descript different electronic commerce protocols precisely, and provided a support for different analysis method.%针对现阶段电子商务协议形式化分析的处理比较混乱、表述精确度不高且通用性较差、存在一些不合理的假设等问题,运用现代模态逻辑理论,结合知识与信念,提出了一种分析电子商务协议的模型:知识与信念模型.该模型主要包含安全环境、知识集、信念集、能力集、切入点和知识化等因素.知识与信念模型很好地解决了上述问题,能够细致、精准地对各种电子商务协议进行形式化描述,并为不同的分析方法提供了模型支持.
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