Organisations should treat Zero Trust as a staged programme, not a single deployment. Start by assessing current systems and processes, then prioritise controls that reduce exposure quickly, such as credential management and federated single sign-on. Build repeatable processes, formalise weak spots, and expand in order so the programme can scale as the business grows while lowering insurer-visible risk.
Why Zero Trust has to mature as a programme, not a project
zero trust lowers insurer-visible risk when it changes how access is granted, monitored and revoked across the environment, not when it is treated as a one-off architecture diagram. The goal is to shrink the blast radius of compromise, make identity and device trust decisions more consistent, and create evidence that controls are improving over time rather than remaining static.
That means the first value comes from sequencing: assess what is already exposed, reduce standing exposure, then extend policy and verification across more systems. A staged model is more defensible to insurers because it shows repeatability, ownership and measurable reduction in control gaps instead of a promise of “full” Zero Trust that has not been operationalised.
In practice, the programme should align access decisions with the actual risk of the asset and the request. For example, workforce access, workload access and third-party access do not all need the same control path, but they do need a common rule that access is explicit, limited and re-evaluated when context changes.
Which controls lower insurance risk fastest
The fastest risk reduction usually comes from the controls that remove easy compromise paths: credential hardening, federation, strong authentication, and removal of broad standing access. Those controls matter because many losses begin with account compromise, reused secrets or excessive privilege, and they are easy for insurers to understand as concrete reductions in attack surface.
Credential management should therefore be treated as a core Zero Trust milestone, not an admin detail. If secrets live too long, are shared across systems, or are hard to rotate, the programme still leaves a large residual exposure even if network segmentation improves. IAM and IGA Basics is useful here because it ties access governance, entitlement review and least privilege to the same operational model insurers usually expect to see improve over time.
Federated single sign-on can also reduce risk when it centralises authentication and makes access decisions easier to audit, but only if it is paired with policy discipline. If federation becomes a shortcut that preserves old entitlements or weak exception handling, the control looks modern while the exposure remains unchanged.
How to show insurers that the programme is reducing exposure
Insurers typically respond to evidence of control maturity, not to slogans. The most persuasive indicators are fewer broad access paths, shorter-lived credentials, stronger enforcement at sensitive entry points, and a clearer inventory of who and what can reach important systems. The programme should therefore produce evidence that access boundaries are narrowing rather than merely being reorganised.
Zero Trust also needs to be demonstrably consistent across human, service and machine access, because risk often persists where one population is upgraded while another is left on legacy patterns. Guide to SPIFFE and SPIRE is a strong reference for workload identity because it shows how attestation, trust bundles and service-to-service authentication support the same principle of explicit, verifiable access. Zero Trust Identity Guide is the broader roadmap for phased adoption across people, workloads and devices.
A mature programme should also make exception handling visible. If legacy protocols, shared accounts or broad admin access continue to exist, those exceptions should be time-bound, reviewed and tracked as residual risk, not hidden inside a general “Zero Trust in progress” narrative.
Risk and Threat Considerations
Zero Trust reduces insurance risk when it lowers the likelihood and impact of account compromise, lateral movement and large-scale misuse of trust relationships. The main failure mode is partial adoption: organisations keep the label while leaving standing privilege, weak credential hygiene or unsegmented access in place, which means the insurer-visible risk profile changes far less than expected.
Failure mechanism: A compromised credential, federated session or overly broad entitlement can still reach critical assets if policy enforcement is inconsistent, exceptions are permanent, or workload and third-party access are left outside the programme.
Impact: The organisation keeps a large blast radius, loses credibility when explaining residual risk, and may see limited premium benefit because the control set does not materially reduce probable loss.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 addresses the attack and risk surface, while NIST Zero Trust (SP 800-207) and NIST SP 800-53 Rev 5 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST Zero Trust (SP 800-207) | PR.AA-05 — Identity Management, Authentication, and Access Control | Zero Trust here centers on explicit access decisions and limiting trust across users and workloads. |
| Recommendation — Enforce least-privilege access with continuous verification and scoped policy decisions. | ||
| NIST SP 800-53 Rev 5 | IA-5 — Authenticator Management | Credential management is a fast way to lower exposure from long-lived or reused access material. |
| IA-9 — Service Identification and Authentication | Workload and service access are part of Zero Trust when machine-to-machine trust must be bounded. | |
| Recommendation — Rotate and govern authenticators so compromised credentials have less usable lifetime. Authenticate services explicitly and avoid implicit trust between internal workloads. | ||
| OWASP Non-Human Identity Top 10 | NHI-07 — Long-Lived Secrets | Long-lived secrets directly undermine the risk reduction goal of staged Zero Trust adoption. |
| NHI-05 — Overprivileged NHI | Excess privilege is a core source of blast radius that Zero Trust is meant to shrink. | |
| Recommendation — Shorten secret lifetime and eliminate persistent credentials where possible. Remove excessive permissions and re-scoped access so compromise has less reach. | ||
Practitioner Guidance
What to prioritise: Start with the access paths most likely to create insurer concern, especially broad administrative access, long-lived credentials, and externally exposed entry points. Those are the controls that most quickly change exposure in a way that can be measured and explained.
What to verify: Verify that each Zero Trust milestone produces evidence, not just design intent. Good evidence includes reduced standing privilege, shorter credential lifetimes, enforced federation, and documented exception expiry dates.
Decision rule: If a control does not reduce blast radius, improve revocation speed, or make access decisions more explicit, treat it as supporting work rather than a risk-reduction milestone.
Practitioner takeaway: The insurance benefit comes from visible reduction in attack paths and privilege, so a Zero Trust programme should be run as a measurable access-risk reduction plan with phased delivery and strict exception control.
Related resources from NHI Mgmt Group
- How can zero trust help healthcare organisations reduce cyber risk?
- How should organisations prioritise zero trust segmentation in a cyber insurance strategy?
- How should organisations implement dynamic data protection when insider risk changes over time?
- When should organisations treat an NHI as a high-priority risk?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on September 28, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
