Zero Trust

Zero Trust is a security model based on the principle "never trust, always verify". It rejects the traditional assumption that anything inside the corporate network is safe and that threats come only from outside. In the Zero Trust approach, no request is trusted by default — every access must be authenticated and authorised, regardless of whether it originates inside or outside.

Why Zero Trust emerged

The classic security model resembled a castle with a defensive wall: a firewall separated the trusted internal network from the dangerous internet. The problem is that once an attacker breaches that boundary — for example by taking over an account through a brute-force attack or phishing — they move freely inside, because everything trusts them. Remote work, the cloud and mobile devices have further blurred the line between "inside" and "outside", making that assumption increasingly risky.

How Zero Trust works

In the Zero Trust model, every access request is verified individually: the user's identity is confirmed (ideally with multi-factor authentication), along with the state and trust of the device and the context of the request, and permissions are granted on the principle of least privilege — only as much as is genuinely needed. All communication is encrypted, for example over HTTPS, and access to resources is often provided through secure channels rather than by broadly opening the network, as in a classic VPN. Zero Trust is not a single product but a strategy combining many mechanisms, which limits the impact of one account or device being compromised and makes it harder for an attacker to move freely across the infrastructure.