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。

youdao

End user vs. system user identities.

终端用户与系统用户身份。

youdao

They interact indirectly through the system user.

它们通过系统用户间接地进行交互。

youdao

RIM says its system is set up in a way that no one, including RIM, can access user information.

VOA: special.2010.08.06

Travelocity, for one, allows a buyer outside the U.S. or Canada to have any flight booking sent to a travel agent anywhere -- so long as he is a Sabre reservations system user -- to have the purchased ticket issued.

CNN: Technology: Flight Planning 101

Android is so far proving relatively popular with tablet manufacturers despite nagging concerns about fragmentation of Android's operating system, user-interface and app store ecosystem.

ENGADGET: Strategy Analytics: Apple still owns tablet market, but Android narrows the gap

There may not be any Mac viruses at the moment, and the way the system handles user accounts and security means that they are unlikely, but we need to take steps to safeguard ourselves against other malicious software.

BBC: Steve Jobs waits on stage, AP