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mTLS Learning Roadmap

Mutual TLS for zero-trust service-to-service authentication.

Estimated time:3–4 weeks

1🌱

Phase 1 — Fundamentals

One-way TLS vs mutual TLS

Client certificate issuance

Certificate authorities for internal services

Handshake flow with client auth

2🕸️

SPIFFE/SPIRE identity model

Automatic sidecar cert issuance & rotation

Workload identity vs network identity

3⚙️

Certificate rotation without downtime

Debugging handshake failures between services

Monitoring cert expiry across a mesh

4🔐

advanced

Zero-trust network policy design

Multi-cluster mTLS trust domains

Incident response for compromised certs

Begin with interview questions to assess your current level.