Perimeter security: Where things stand today

Perimeter security is crucial for critical infrastructure facilities such as airports, power substations and data centers. Today, perimeter security technologies have become more accurate and less prone to false alarms, thanks to advances made in this regard. This article looks at some of the perimeter security threats facing users, and how the latest perimeter security technologies can help.
 

Perimeter threats facing end users

 
Perimeter security is the first line of defense for many organizations, especially those that are critical in nature. Often targeted by hostile actors, these end user entities face various types of threats at the perimeter level.
 
“The primary threats include unauthorized access, theft, vandalism, sabotage, insider threats, and increasingly sophisticated attempts to disrupt critical infrastructure. If we take data centers as an example, as they continue to expand in size and strategic importance, operators must secure not only buildings, but also substations, cooling infrastructure, backup power systems, equipment yards, and access roads,” said David Pecora, Data Center Lead at FLIR.
 
“The most common threats are those of opportunity: trespass and vandalism, copper, equipment and goods theft, and people surveilling the perimeter either by walking or driving, long before anything actually happens. That last one gets overlooked and it shouldn’t. Then, in critical infrastructure environments, threats such as protests, destruction of assets and espionage should be planned for through a vulnerability assessment process,” said Ron Petrie, Director of Sales at SightLogix.
 

Why perimeter security is essential

 
To ensure hostile actors can be stopped at the outset, having an effective perimeter security system is critical for these organizations. “The challenge is identifying genuine threats early enough to respond before an incident escalates. An effective perimeter solution provides early detection, allowing security teams more time to verify the event and respond appropriately,” said Tertius Wolfaardt, Engineering and Training Manager, South Asia Pacific at Axis Communications.
 
As aforementioned, perimeter security can benefit a variety of verticals, especially those that are critical in nature.
 
“Peripheral security faces sophisticated threats, such as complex intrusions, and is particularly important at national infrastructure facilities like power plants and data centers, as well as large-scale logistics and manufacturing complexes,” said James Lee, Sales Director at C-PRO Electronics.
 
“Perimeter security is important across virtually every vertical, but it is particularly critical for critical infrastructure such as military installations, airports, seaports, data centers, and oil and gas facilities. IDIS addresses the diverse requirements of each environment with a broad camera portfolio and AI-powered video surveillance solutions designed to enhance detection, verification, and response,” said Dennis Choi, GM of MENA at IDIS.
 
In some cases, perimeter security is important for retail, too.
 
“Perimeter security is especially important across fast-food restaurants, retail, express car washes, and auto service businesses. These locations often have multiple access points, outdoor areas to monitor, inventory or merchandise stored on the property, and long periods with little or no staff present,” said Steve Womer, SVP of Engineering at Interface Systems.
 

Latest advances

 
Perimeter security technologies have evolved over the years. Today, perimeter security is enhanced with a range of new sensors and devices that are much more effective in detecting irregularities and reducing false alarms than conventional solutions.
 
Video surveillance is an example. “Perimeter security has moved well beyond cameras that simply record activity. Newer camera technology can distinguish between people, vehicles, and other movement, allowing security teams to identify activity in restricted areas more accurately. Video verification gives monitoring teams an opportunity to confirm what is happening before contacting law enforcement, helping reduce unnecessary dispatches,” Womer said.
 
Thermal imaging can also play a key role at the perimeter, where poor lighting and adverse weather can render visible light cameras less effective. “Thermal imaging has become particularly valuable because it detects heat signatures rather than relying on visible light. This enables reliable detection in complete darkness, adverse weather, fog, rain, and glare-prone environments where conventional cameras often struggle,” Pecora said.
 
Then there are radar and LiDAR. The former uses radio waves to detect and track people, vehicles, and objects over long distances, while LiDAR uses laser pulses to create precise three-dimensional maps, identifying movement, shapes, and intrusions with high spatial accuracy.
 

Layered approach

 
While each sensor is useful in its own right, putting them together is what makes perimeter security most effective.
 
“There is no perfect single sensor technology on the market. The best practice for improving detection and accuracy is to design layers of complementary sensor technologies. You used to alarm when someone was already on your fence. Now the goal is to know while they're still walking toward it, which is what buys you time to verify, deter, or respond. However, in many cases it is difficult to legally respond to an incident off property, but if the design includes a technology for situational pre-alarm and a second complementary sensor on the fence for alarm, the SOC operations can be optimized regarding improved detection accuracy and reduced false alarms,” Petrie said.
 
Wolfaardt and Lee concur with those points. “Combining information from multiple sensors can also help verify events before an alarm is generated. For example, radar can detect movement over long distances, while a camera visually confirms the object and classifies it. This allows security teams to focus on genuine incidents instead of spending time investigating nuisance alarms caused by wildlife, moving vegetation or changing weather conditions,” Wolfaardt said.
 
“Radar and LiDAR measure the precise distance and coordinates of objects, while thermal imaging and PTZ cameras track and identify them, enabling superior detection even at night and in adverse weather conditions. Through the verification of composite sensor data and AI filtering, simple malfunctions caused by non-threat factors – such as wind-blown branches, small animals, rain, or snow – can be significantly reduced,” Lee said.
 
And with the help of AI, perimeter security can achieve even further detection accuracy and false alarm reductions. “Perimeter security is increasingly shifting toward AI-based detection that can distinguish genuine threats from irrelevant movement. Developed by IDIS’s in-house R&D team specifically for video surveillance, IDIS Deep Learning Analytics (IDLA) accurately classifies people and vehicles while filtering out common causes of nuisance alarms, allowing operators to focus on events that require attention,” Choi said.