Web Developer Dictionary

Zero Trust is a security model of "trust no one by default". Unlike the traditional approach where the internal network is considered safe, Zero Trust validates every request regardless of its origin — external or internal to the perimeter. Principles Verify explicitly — authenticate and authorise every request (user + device + context) Least privilege — minimum necessary permissions, only for the needed duration Assume breach — act as if an attacker is already inside. Minimise lateral movement In practice MFA for all users, including internal services mTLS between microservices — mutual authentication Network microsegmentation — services cannot freely communicate with each other Continuous monitoring and logging of all connections Tools Google BeyondCorp, Cloudflare Access, HashiCorp Vault, Istio service mesh.