Zero-Trust Principles

Why this matters

Perimeter security assumes the inside of your VPC is safe — zero-trust assumes it's already compromised. The principles (never trust, always verify, least privilege, assume breach) translate directly into cloud controls: identity on every hop, mTLS between services, and IAM scoped to single actions. Skipping zero-trust is how a leaked AWS access key turns into ransomware on your DB.

Demo

Inspect identity-aware access controls that replace network-level trust.

Try it yourself

1. Audit IAM and list every principal with *:* permissions — argue why each one violates least privilege.
2. Replace one long-lived access key in a workflow with Workload Identity Federation (or OIDC) and confirm rotation works.
3. Enable IAP or Conditional Access on a non-prod admin endpoint and verify the prompt fires from an unmanaged device.

Prompt your AI

Use these three in order. Each builds on the one before.

1. Basics & terminology

In one paragraph, explain zero-trust like I'm new to security — what changes vs perimeter-based trust, and why.

2. Why it works (the mechanism)

Walk me through how a zero-trust request is verified end-to-end: identity, device, network context, and authorization at each step.

3. Advanced — application & what's next

Given a 200-microservice mesh inside a single VPC, design a phased zero-trust rollout that starts with the most blast-radius-prone services first.

References

• NIST SP 800-207 — Zero Trust Architecture
• Google BeyondCorp paper