Cloud & Infrastructure Practical By Samson Tanimawo, PhD Published Mar 5, 2026 4 min read

The Zero-Trust Network Shift

Perimeter security is dead. The zero-trust shift, the principles, and the practical migration.

Principles

Identity-based access, not network-based. The user, not the network, is the principal.

Assume breach. Internal services authenticate as if external.

Identity provider as source of truth.

Service mesh or proxy for service-to-service auth.

Per-request authorisation, not per-session.

Inventory existing trust assumptions.

Replace one at a time. Years-long project for large fleets.

Worth it; perimeter security has known failure modes.