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Defining Zero Trust – And How It Impacts Physical Security

Editor Introduction

Traditional security models protected a perimeter like a castle moat, assuming anyone inside was safe. Zero trust removes that implicit trust entirely, recognizing that threats can exist both outside and inside a facility. Zero trust is a routine and accepted concept in cybersecurity. Given the importance of information technology and the increasing convergence of physical and logical security, the tenet is becoming a dominant principle in physical security, too. We asked our Expert Panel Roundtable: 

Briefly define zero trust and explain how it

Zero trust is about removing assumptions from security. Access is no longer based on a one-time credential check. It requires continuous validation of users, devices, and behaviour, regardless of where access occurs.

In physical security, this shifts the focus away from static controls like badges alone toward a more dynamic, real-time understanding of activity. Organizations need greater visibility into not just who is entering a space, but whether their actions align with expected behaviour.

Video plays a critical role in enabling this insight. When combined with analytics and integrated systems, it provides the context needed to validate events, detect anomalies, and support faster, more confident decision-making. This shift is driven by evolving threats and rising expectations.

Security teams are being asked to deliver more intelligence, reduce uncertainty, and operate proactively bringing physical and cyber strategies closer together. impacts physical security.

Editor Summary

Traditional security models relied on perimeter defences, but zero trust removes implicit trust entirely, requiring continuous verification of every user, device, and system. This framework is reshaping physical security and converging it with cybersecurity. Physical access now requires dynamic, multi-factor authentication, while connected devices like cameras must actively prove their identities to prevent network compromise.

Read the full article on SecurityInformed.com

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