By RON-LY Solutions Engineering Team · Published August 28, 2026
Short answer
Zero trust architecture assumes no user or device should be trusted by default, even if it’s already inside the network. Every access request is verified based on identity, device state, and context, rather than relying on network location as a proxy for trust.
Why it matters
Traditional “castle and moat” security assumes anything inside the perimeter is safe — which breaks down the moment a single device is compromised or a user’s credentials are stolen. Zero trust limits how far an attacker can move once they’re in.
Key considerations
- Identity verification for every access request, not just at initial login
- Network segmentation so a breach in one area doesn’t expose everything
- Least-privilege access — users and systems get only the access they need
- Continuous monitoring rather than one-time perimeter checks
Common mistakes
- Treating zero trust as a single product purchase rather than an architecture
- Implementing segmentation without updating access policies to match