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Technical Guide38 pages

Zero Trust Identity: A Practitioner's Implementation Handbook

Zero Trust becomes real when access decisions are continuously evaluated using identity, device posture, resource sensitivity, behaviour, and policy. IGA supplies the governance evidence: who should have access, who approved it, and when it expires.

Important note: Security architects, IAM engineers, platform teams, and zero trust programme owners.

Immediate Takeaways

  • Start with identity inventory and policy enforcement before buying more perimeter tools.
  • Use NIST SP 800-207 concepts: policy engine, policy administrator, and policy enforcement point.
  • Align work to CISA maturity pillars: identity, devices, networks, applications/workloads, data, plus cross-cutting visibility and automation.
  • Make standing privilege the exception; use just-in-time access for sensitive actions.

Action Plan

  • Phase 1: centralise identity sources, MFA, lifecycle automation, and app ownership.
  • Phase 2: add device posture, risk signals, and conditional policies.
  • Phase 3: move admin access to just-in-time, time-bound approvals.
  • Phase 4: automate policy decisions and continuously certify high-risk access.

Control Checklist

  • Identity source of truth with lifecycle automation.
  • MFA and phishing-resistant authentication for privileged users.
  • Policy decision records with context: identity, device, resource, risk, and approval.
  • JIT access for admin actions and sensitive data.
  • Continuous access review for high-risk roles and anomalous privilege changes.

Useful References

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