Zero Trust in the Modern IT Landscape

Organisations have long relied on traditional security tools such as network segmentation, VPNs, and firewalls. However, the way we work has changed drastically — more mobility, diverse devices, and increasingly complex business systems have given rise to more sophisticated cybersecurity threats. Zero Trust is a new security approach that is becoming ever more important.

What is Zero Trust

The Zero Trust security model fundamentally changes how organisations approach cybersecurity. Rather than relying on a secure "perimeter," it operates on the principle: "never trust, always verify."

By dynamically linking traffic to identity rather than to a device or user with fixed permissions, organisations can define very precisely what is permitted in which context. The model abandons thinking in terms of networks and IP addresses and instead focuses on the actual requirements of applications.

The four trust domains

Domain 1: Identity of users and devices This domain focuses on establishing and verifying the identity of users and devices. It covers determining user identity and device characteristics such as role, security level, OS, patch status, and antivirus status.

Domain 2: Application governance and logging This domain concentrates on traffic destinations: applications. A central service catalogue is created on which routing and security are based. Applications determine what traffic they accept and what rules are associated with it.

Domain 3: Enforcement This domain revolves around security and encryption. Everything — from packets to policies — is encrypted and/or cryptographically signed. Policies determine under what conditions traffic is permitted, blocked, or logged, both centrally and by application administrators.

Domain 4: Enrichment This domain focuses on insights through monitoring and securing the network, devices, and users. Metrics are collected at all endpoints and aggregated centrally.

Benefits of decentralised policy-based working

By focusing on end devices and anchoring security across all Zero Trust domains, organisations can make optimal use of endpoints and evaluate security early (shift left). Policies offer far greater depth than traditional IDS/IPS solutions.

Next steps: threat intelligence, analytics, and automation

With Zero Trust, organisations can significantly raise their security posture by using tools that integrate natively. By detecting deviations in configuration, browser, or OS version, patterns can be recognised per user and compromised sessions identified before they cause damage.