本文对SSL、SET两个电子商务安全协议作一比较，并针对不同的安全需要，构造一个分级安全控制模型，较好地改进了SET协议。
This article compares SSL with SET protocol, and constructs a hierarchical safety control model to suit for different safety requirements, this model will improve SET protocol.
本文对SSL、SET两个电子商务安全协议作一比较，并针对不同的安全需要，构造一个分级安全控制模型，较好地改进了SET协议。
This article compares SSL with SET protocol, and constructs a hierarchical safety control model to suit for different safety requirements, this model will improve SET protocol.
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