Zero-Trust Readiness Checklist

When to Use This Checklist

Use this checklist when planning a move to zero-trust architecture, an approach where no user, device, or network segment is trusted by default and every request is verified. It is especially relevant for organizations retiring perimeter-based VPN security, supporting remote work, or running workloads across multiple clouds where there is no meaningful network boundary to defend.

How to Use This Checklist

Zero trust is a journey, not a switch, so begin with discovery: map every user, device, service, and data store. The core principle to verify is that identity, not network location, governs access. Confirm strong identity and MFA for humans, and cryptographic identity such as mTLS for workloads. Then layer least-privilege authorization, micro-segmentation, and encryption of all traffic including east-west.

Plan the rollout in phases. Switching everything to zero trust at once tends to break legitimate access and erode trust in the program. Pilot on a non-critical application, learn, then expand.

What Good Looks Like

Access decisions are driven by verified identity and context rather than by being on the corporate network. Humans authenticate with MFA, and services authenticate to each other cryptographically, so a foothold in the network grants no implicit access. Authorization is least-privilege and policy-based, evaluated continuously rather than once per session. The network is micro-segmented, all traffic is encrypted, and long-lived credentials are replaced by short-lived, identity-bound tokens. Every access decision is logged, feeding both audit and threat detection.

Common Pitfalls

The most common misconception is treating zero trust as a product to buy rather than an architecture to build. Another is keeping implicit trust for east-west traffic, so anything already inside the network roams freely. Big-bang rollouts that break existing access generate resistance and stall the program. Teams also retain long-lived credentials and broad permissions, undermining the model from the start. Finally, weak logging leaves the organization unable to detect or investigate misuse.

Related Resources

Follow the NIST zero-trust architecture model, enforce the principle of least privilege, and use OAuth 2.0 / OpenID Connect for identity. A service mesh provides workload identity and mTLS, while short-lived credentials from secrets-management best practices replace standing secrets.