Loading...
A security model with one rule: verify everything, every time, and trust nothing by default.
Quick Definition
Zero trust is a security model that assumes no user, device, or network is inherently trusted and verifies every access request continuously. Enforcing least privilege and strong authentication, it replaces perimeter-based security and is foundational to modern cloud and identity security.
Zero trust is a security model built on a single principle: no user, device, or service is trusted automatically, even inside the network. Every request is authenticated, authorized, and encrypted, every time. The old model trusted anything inside the perimeter; zero trust assumes the perimeter is already breached.
In practice it means strong identity through IAM everywhere, least-privilege access granted through roles and just-in-time elevation, networks segmented so a compromise in one place reaches nothing else, and continuous verification rather than one login at the gate.
Example. An attacker phishes a developer's credentials. Under zero trust, the stolen identity faces device checks, scoped permissions, and segment boundaries: it cannot reach production databases, and the unusual access pattern raises an alert within minutes. The breach stays a near miss.
Zero trust is also quietly cost-relevant: least privilege limits who can create expensive resources, and compromised credentials are a classic source of shock bills from cryptomining. Security architecture and cost governance reinforce each other. The cloud security guide and AWS security best practices map the implementation path.
No. It is an architecture combining identity, segmentation, and policy. Vendors sell components; the model is how they are assembled.
Well implemented, barely: single sign-on and automated role grants keep friction low while removing standing risk.
Stolen credentials with broad permissions fund cryptomining sprees. Scoped, verified access makes that classic shock-bill scenario far harder.