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.
您应该记录任何不成功的系统登录。
You should also log any attempted unauthorized access to the system.
目标服务器的系统登录模块和实用工具类。
System login modules and utility classes for the target server.
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