Zero trust has gone from security principle to overused marketing term. Here's what it actually means and how to implement it pragmatically.
The Core Principle
Zero trust is a security model built on the principle that trust should never be assumed based on network location. Traditional perimeter security treats everything inside the network as trusted. Zero trust rejects this: inside the network is not a trust boundary. Every request should be authenticated, authorized, and encrypted regardless of where it originates.
What Zero Trust Implementation Actually Involves
Zero trust is not a product you buy — it's an architectural transformation touching identity and access management, network architecture, endpoint management, and application security. Starting with identity provides the most security improvement per dollar of effort.