系统登录会使用到诸如源 ID（安全识别符），域和系统用户名等信息进行身份验证，因此被认为是安全的。
The system login uses information such as source ID (SID), domain and system user name for authentication, so it is considered secure.
所有这些使得它成为一种实际可用的的支付系统的条件是：服务提供商必须要将唯一识别符与银行帐号或者信用卡链接起来。
All that's required to turn this system into a reliable payment mechanism is a service provider willing to link that unique identifier to a bank account or credit card.
使用的何种具体的命名系统特定于应用程序，但通常可以使用一种与现有应用程序类似的结构，并且这种结构很可能基于某种惟一识别符。
The exact naming system you use is application-specific, but you can usually use a similar structure of your existing application, which will probably be based on some kind of unique identifier.
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