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1·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。

2·The popular protocol of the Secure Electronic Transaction(SET)discussed by this paper has the flaws of the goods atomic transactions and certified delivery atomic in transacting digital goods.

文章对现在流行的安全电子交易SET标准进行分析，指出SET协议存在不满足数字商品交易的原子性以及确认发送原子性等缺陷。

3·A portable electronic system configured for a secure transaction includes a card having a width, length, and thickness, wherein a ratio of length to thickness is at least 5.

一种为安全交易配置的便携式电子系统包括具有宽度、长度和厚度的卡，其中长度与厚度的比至少为5。

4·Finally, we propose an electronic commerce transaction system based on the forward secure threshold proxy signature scheme.

最后基于前向安全代理签名方案给出了一个电子交易方案。