The guidance provides a methodology for securing buildings against intruders, terrorists and other physical threats that try to intrude or gain access to a vulnerable asset. The report narrows down into recommendations for a robust and usable approach for the physical protection of infrastructures against this borderless phenomenon. A detailed analytical procedure is illustrated for identifying the weaknesses of potential terrorist targets and assess the relevant risk for different terrorist tactics.

"An asset’s secured perimeter can be considered as the first line of defence in a multi-layered protection scheme."

Advice is provided for the introduction of protection measures against both external and internal explosions and design methodologies are presented for minimizing the likelihood for the development of a progressive collapse mechanism. Moreover, specialized perimeter physical protection measures are proposed that may successfully restrict unauthorised vehicle and intruder access, supplemented by the employment of modern digital technologies, such as video surveillance, smart sensors and video analytics. The novel and emerging threat landscape is also addressed, such asthe malicious use of Unmanned Aircraft Systems, requiring new response strategies that call for the adoption of state-of-the-art counter technologies.