在此工作的基础上，设计了一种基于RSA密码体制的最优化公平交换协议。
Afterwards, a novel fair exchange protocol totally based on RSA signature scheme is devised.
基于一种可转换的认证加密方法，设计出一种新的包含半可信第三方的公平交换协议。
A new fair exchange protocol with semi-trusted third party is proposed on the basis of a new convertible authenticated encryption scheme.
可追究性是安全电子商务协议必须遵循的重要原则之一，乐观公平交换协议是一类重要的电子商务协议。
Accountability is one of main properties that security electronic commerce protocols must satisfy. Optimistic fair exchange protocols are important electronic commerce protocols.
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