Zero Trust Architecture Implementation Guide
A phased zero trust implementation guide covering identity, access, devices, networks, applications, data, and monitoring.
Start with identity and access
Zero trust begins with the assumption that no user, device, or network path is automatically trusted. Strong identity, multi-factor authentication, least privilege, and role-based access are the foundation.
Review access regularly and remove permissions that are no longer needed.
Segment critical systems
Network segmentation limits the impact of compromised credentials or devices. Critical applications, databases, admin tools, and production systems should have controlled access paths.
Segmentation should be paired with monitoring so suspicious movement can be detected quickly.
Verify device posture
Access decisions should consider whether the device is managed, patched, encrypted, and compliant with security policies.
For contractors and external partners, apply stricter access controls and limit exposure to only the systems required for their work.
Protect applications and data
Applications should use secure authentication, input validation, secrets management, encryption, logging, and regular vulnerability testing.
Sensitive data should be classified and protected through access controls, retention rules, and audit trails.
Monitor and improve continuously
Zero trust is not a one-time project. It requires continuous monitoring, alert tuning, incident response planning, and periodic reviews of users, devices, systems, and vendors.
The goal is to reduce blast radius and improve visibility without creating unnecessary friction for legitimate users.