Physical barriers are the last line of defense that, when paired with a security alarm and cameras, creates a more comprehensive and safe system. These include metal detectors, security checkpoints, locked doors, and walled offices. While they can't protect against all forms of attack, they can prevent many common methods used by intruders to enter buildings and facilities.
Metal detectors screen people as they enter facilities or areas where weapons are allowed. They look for metals hidden on persons (such as knives, guns, and other objects made out of metal) as well as in their clothing (for example, belt loops, pants pockets, and jackets). The detector then beeps or flashes an indicator light if it finds something metallic. People must pass through this screening process before entering certain areas such as schools and prisons.
Security checkpoints require that everyone passing through them open their bags or other containers (such as briefcases, laptop bags, and backpack) to search for weapons or other prohibited items. The checker will be responsible for notifying security of any findings during check-in procedures. Checkpoints are useful tools for reducing the risk of violence at events with large crowds of people, such as concerts, sports games, and political rallies.
In physical security, barriers are used to establish borders, delay or prevent entry, restrict mobility to a specific area, hide visual observation into or out of an area, and inhibit technology infiltration of an area. The most common types of barriers are physical barriers such as walls, fences, and gates; human barriers such as guards and patrols; and technological barriers such as surveillance cameras and heat sensors.
Barriers have two main purposes in physical security: to protect people or properties inside a boundary from potential threats outside this boundary and to keep intruders away from important features such as buildings, vehicles, and equipment.
Physical barriers are useful for both protecting people and property inside a boundary and keeping intruders away from these features. For example, a fence can be used to separate different areas of a campus or facility from each other while also preventing unauthorized persons from entering these areas. In addition, fencing can also be used to contain and control animals or machinery that would otherwise be able to escape if not surrounded by a barrier. Finally, a physical barrier can be used to block certain views within the perimeter of a site.
Human barriers include guards and patrol officers who check credentials and permit access to restricted areas. Guards may use verbal instructions, signal lights, and physical force to control which individuals are allowed to enter or remain inside a boundary.
Physical security entails the employment of various layers of interconnected systems, such as CCTV monitoring, security guards, defensive barriers, locks, access control, perimeter incursion detection, deterrent systems, fire protection, and other systems meant to safeguard people and property. Physical security is used to create a hostile environment for intruders or unlawful occupants.
CCTV surveillance is the most common form of physical security today. It can be found in almost all public spaces to protect against crime. The quality of CCTV cameras has improved greatly over the last few years, so they are now capable of recording high-quality images even under low light conditions.
Security guards are used by businesses to monitor their properties 24 hours a day. They can either work within a guardhouse or patrol along designated routes. Both approaches have their advantages and disadvantages. A guardhouse provides a central location where security officers can change shifts or duties without having to search for another job. However, this also means that anyone who enters the building is visible from the guardhouse window at all times. This is not a problem if you want everyone entering your property to be recorded by camera, but not every violation needs to be reported. If there's something dangerous and unknown about, allow people to enter, but make sure they aren't hiding anything important by checking their ID cards or asking them questions about what they're doing on the property.
Physical Barriers of Various Types
The environmental and natural elements that operate as a barrier in communication while transmitting a message from sender to receiver are referred to as physical barriers. When communications are conveyed by the sender, physical barriers such as doors, walls, distances, and so on prevent efficient communication. However, these barriers can also be used by receivers to prevent or limit the effects of messages they do not want to receive.
In computer science, physical barriers include items that prevent network traffic from passing through their intersections with other traffic. These items include firewalls, routers, switches, and antennas.
Physical barriers also include obstacles within a signal's waveform that prevent it from reaching its destination. The length of a waveform is limited by factors such as transmission speed and distance, so waves will be reflected or absorbed before they reach their destination. This is why signals need a clear path between sender and receiver: If a roadblocks the signal, then it cannot be transmitted.
Finally, physical barriers include elements that disrupt electronic signals before they reach their destination. These elements include radio frequency (RF) spikes, electromagnetic pulses (EMPs), and lightning strikes. An RF spike occurs when an antenna emits energy at frequencies outside of its design parameters. This can happen if an antenna is damaged during construction or maintenance work. An EMP results when the earth passes through a nuclear explosion.
Physical security is the safeguarding of humans, hardware, software, networks, and data from physical acts and events that might result in severe loss or harm to an organization, agency, or institution. Access control, surveillance, and testing are the three basic components of the physical security architecture. These components serve as the foundation for a comprehensive security program.
Physical security encompasses all aspects of protection from damage or theft of people, property, documents, computers, systems, and equipment. This includes items such as surveillance cameras, locked doors, safe rooms, intrusion detection systems, biometric authentication devices, and identification tags.
Physical security protects an organization's most important asset: information. As information technology becomes more integrated with organizational operations, it is also becoming easier to steal or lose. Stealing or losing this type of information can have serious consequences for an organization, ranging from financial losses due to system downtime to legal actions resulting from unauthorized disclosure of confidential business information.
Information security is the practice of selecting, implementing, and maintaining effective controls over resources, people, processes, and technology to prevent information risk and minimize the effects of information risk if prevention fails. Physical security is an integral component of information security because it provides the necessary safeguards against physical risks to information systems and information assets. For example, physical security prevents employees from modifying computer hardware or software without proper authorization.
This encompasses fire, flood, and natural catastrophe protection, as well as burglary, theft, vandalism, and terrorism. It also includes testing for intrusions and unauthorized activities.
In other words, physical security risks can be anything that would cause damage to your facilities if it happened physically within them. This could include fires, floods, explosions, collisions with animals, etc. Even things like lightning strikes or ice storms can cause significant damage to buildings if they occur close to where people work.
It's important to note that physical security risks don't have to do with crime to be considered threats to personal safety. For example, earthquakes, tornadoes, and hurricanes can cause serious damage to buildings but not necessarily involve any criminal activity.
Similarly, even though crime may not be present in some area you are responsible for, that doesn't mean it's not a threat. For example, if there is no one around to report crimes committed in your facility, it can lead to misconceptions about how safe it really is. Or, if there are not sufficient security measures in place to prevent these crimes from happening in the first place, this could lead others to believe that there is no need for more security.