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lockS and acceSS control
JEFF DINGLE
e building exterior often being the first line of defense, the most
common entry points are doors and windows. Many security features
help identify an intrusion, such as alarms and closed-circuit televi-
sion (CCTV) systems. Without good locks, your alarm system will let
you know when there is an intrusion and the CCTV will record the
intruders taking your stuff. Locks and access control systems should
allow authorized users while refusing unauthorized users. Proper sys-
tems should not let the unauthorized in or keep out authorized users.
Locks
Locks are useful in quickly securing (or opening) doors or access to
things we want to protect. A lock is a mechanical device commonly
used in a door, cabinet, or ...