There are many directive principles in the electronic transaction protocol designing such as security, anonymity, non-repudiation, atomicity, fairness and efficiency.

电子交易协议的设计有安全性、匿名性、非否认性、原子性、公平性与效率等原则，这些原则在协议设计时具有指导作用。

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Secure Electronic Transaction protocol(SET) has guaranteed security problem in the electronic payment process through formulating standard and using cryptogram technology.

安全电子交易协议SET通过制定标准和采用各种密码技术手段，确保了电子支付过程中的安全问题。

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Secure Electronic Transaction protocol(SET) has guaranteed security problem in the electronic payment process through formulating standard and using cryptogram technology.

安全电子交易协议SET通过制定标准和采用各种密码技术手段，确保了电子支付过程中的安全问题。

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