为了实现安全的网络在线支付，国际上已经提出了多种安全支付协议，其中SSL是目前国内网络在线支付中最常用的安全协议。
In order to ensure the security of network online payment, there are some secure payment protocols that are used internationally and the SSL is in common use domestically.
在目前已经实现的电子商务安全协议中，最常用的是SET和SSL两种协议。
SET and SSL are two protocols that are currently used most commonly among the ec security protocols.
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