What is Zero Trust?

What it is

Zero trust is a security model built on the idea that no user, device, or network location should be trusted automatically. Access decisions should be based on verification, policy, and context. :contentReference[oaicite:19]{index=19}

How it works

NIST explains that zero trust architecture uses zero trust principles to plan infrastructure and workflows, with authentication and authorization performed before access to resources. :contentReference[oaicite:20]{index=20}

In practical terms, this often means strong identity checks, device posture checks, least-privilege access, and more granular control around applications and data.

Why it matters in real life

Zero trust matters because modern organizations use cloud services, remote work, SaaS apps, and distributed systems that do not fit older perimeter-only security models very well. NIST’s more recent guidance continues to expand practical implementation patterns. :contentReference[oaicite:21]{index=21}

Common misconceptions

A common misconception is that zero trust is one product. In reality, NIST describes it as an architectural and policy approach rather than a single tool. :contentReference[oaicite:22]{index=22}

Another misconception is that zero trust means trusting nothing under any circumstances. In practice, it means verifying continuously and making access decisions more carefully.

Related questions

What to learn next

Sources

• NIST SP 800-207 Zero Trust Architecture
• NIST NCCoE Implementing Zero Trust Architecture