Enhancing security with Zero Trust

As organisations race to adopt AI, cloud and hybrid infrastructure, cyber-security has entered a new phase. It’s one defined less by perimeter defence and more by managing complexity. But as environments have evolved, many security strategies haven’t kept pace. The result is a widening fragmentation gap between how connected modern systems are and how disjointed the tools securing them remain.

 

For years, the default response to new threats has been to deploy another security solution. Each new risk vector has added a layer to the stack. While on the surface, this appears to strengthen defences, it often creates sprawling security stacks where tools operate in isolation, data is siloed, and teams lack a single view of risk.

 

More tools, more trust gaps

Traditional security models were built around the idea that anything inside the network could largely be trusted. But in today’s environments, where users connect from home offices, cloud platforms, mobile devices and unmanaged networks, location alone does not equal trustworthiness.

 

Security teams are managing dozens of disconnected systems, each with its own interface, policies and alerts. Without integration, these tools fail to share context. The result is limited visibility into user identity, device posture and application access across the wider environment.

 

Threat actors increasingly exploit these gaps. Rather than targeting a single vulnerability, they move laterally between poorly connected systems, taking advantage of inconsistent controls, excessive permissions and delayed responses. Fragmented architectures make this easier, as organisations often struggle to continuously verify in real time.

 

Zero trust changes that model. Instead of assuming trust based on network location, it applies a ‘never trust, always verify’ approach where every user, device and application request must be continuously authenticated, authorised and validated.

 

Identity becomes the new perimeter

At the heart of zero trust is identity. Organisations need to know exactly who is connecting to the network, what device they are using, what role they perform and whether their device meets security policy before access is granted.

 

This requires usernames and passwords but also multifactor authentication, contextual access policies and continuous device posture checks, which are all becoming essential components of modern security architectures.

 

Role-based access control also plays a critical role. Users should only receive the minimum level of access required for their role, limiting the impact of compromised accounts or insider threats.

 

The same principle now extends to devices. As IoT, operational technology and unmanaged endpoints continue to expand the attack surface, organisations need visibility into every connected device and the ability to apply granular access policies dynamically.

 

Speed is the new battleground

Attackers are increasingly operating at machine speed, using automation and AI to identify and exploit weaknesses faster than ever. In contrast, fragmented security operations are slowing organisations down and extending the gap. With every disconnected tool introducing friction, these delays can be the difference between containing a threat and suffering a breach.

 

Zero trust helps close this gap by enabling integrated visibility and coordinated enforcement across the environment. Endpoint detection and response, network access control and zero trust network access technologies can work together to continuously assess trust, isolate compromised devices and contain threats before they spread.

 

From fragmented defence to unified resilience

Cyber-resilience is about understanding and managing risk across an interconnected ecosystem. This requires a shift away from fragmented security architectures toward unified platforms that provide end-to-end visibility.

 

The goal is not to eliminate every tool, but to ensure they operate as part of a cohesive framework. By aligning identity, access control, endpoint security and network visibility into a unified strategy, organisations can reduce complexity, improve response times and regain control over expanding digital environments.

 

As the attack surface continues to grow, the organisations that succeed will be with a unified zero trust approach. Without this, even the most advanced security tools will struggle to deliver the resilience required in today’s threat landscape.

 

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Dave Spillane is Systems Engineering Director at Fortinet

 

Main image courtesy of iStockPhoto.com and Olivier Le Moal