The system login uses information such as source ID (SID), domain and system user name for authentication, so it is considered secure.

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。

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However, earlier versions allowed you to login without user name and password in certain circumstances.

然而早期的版本在某些情况下你即使没有用户名和密码也可以登陆。

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First, there is almost nothing dynamic about it anymore — just the user name and login/logout link.

首先，它几乎没有任何动态内容 — 只有用户名和登录/退出链接。

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When authenticating via social login, the user passes dozens of data fields to you including: name, email, birthdate, hometown, relationship status, political views, interests, activities, work history, religious views and education level.

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