Access control
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In physical security and information security, access control (AC) is the selective restriction of access to a place or other resource, while access management describes the process. The act of accessing may mean consuming, entering, or using. Permission to access a resource is called authorization.
Common physical security access control with a finger print
A sailor checks an identification card (ID) before allowing a vehicle to enter a military installation.
Drop Arm Optical Turnstiles Manufactured by Q-Lane Turnstiles LLc
Underground entrance to the New York City Subway system
Physical security
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Physical security describes security measures that are designed to deny unauthorized access to facilities, equipment, and resources and to protect personnel and property from damage or harm. Physical security involves the use of multiple layers of interdependent systems that can include CCTV surveillance, security guards, protective barriers, locks, access control, perimeter intrusion detection, deterrent systems, fire protection, and other systems designed to protect persons and property.
Modern prisons are among some of the most physically secure facilities, with almost every area under tight access control and surveillance. Pictured here is the exterior of Shata Prison in Israel, which is secured through the use of high fences, razor wire, protective barriers, guard towers, and security lighting.
Canadian Embassy in Washington, D.C. showing planters being used as vehicle barriers to increase the standoff distance, and barriers and gates along the vehicle entrance
Spikes atop a barrier wall act as a deterrent to people trying to climb over the wall
Vehicle barrier at the US Mexico border, 2010