File safety specifications (so that multiple machines can access the same file without locking problems and opportunistic locking).

文件安全规范(这样，多台计算机就可以访问同一个文件，而不会出现锁定问题和伺机锁定)。

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If no match is found, the screensaver is locked, effectively locking an opportunistic attacker out of the system.

如果未找到匹配，则锁定屏幕保护程序，从而可以将那些碰运气的攻击者有效地锁定在系统外部。

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