An enclave approach uses separate cloud environments for different data types, such as a commercial tenant for general business work and GCC High for defence-related data. This limits blast radius and helps keep sensitive workloads isolated, but it also creates operational complexity around user management, collaboration, and data sharing.
Expanded Definition
An enclave approach is a segmentation pattern for sensitive computing and identity operations. Instead of placing every workload, tenant, and credential in one shared environment, organisations separate data classes into distinct enclaves, such as a commercial tenant for general collaboration and a regulated tenant for defence, public sector, or restricted partner data.
In NHI and IAM practice, the value of this design is not just data separation. It also changes where service accounts live, how API keys are issued, which connectors can cross boundaries, and how administrators prove that access is scoped to the correct enclave. That makes enclave design closely related to least privilege, workload isolation, and operational segregation, even though no single standard governs the term itself. For control mapping, teams often use NIST SP 800-53 Rev 5 Security and Privacy Controls as the baseline for access control and system separation expectations.
The most common misapplication is treating an enclave approach as a branding choice rather than a technical boundary, which occurs when shared identities, shared secrets, or uncontrolled sync tools bridge the environments.
Examples and Use Cases
Implementing an enclave approach rigorously often introduces duplication in identity, collaboration, and governance processes, requiring organisations to weigh stronger isolation against higher administrative overhead and slower cross-domain workflows.
- A defence contractor keeps contract documents and restricted engineering artefacts in a separate enclave while general HR and marketing work remains in a commercial tenant.
- A healthcare supplier isolates patient-adjacent systems from general productivity tools so service accounts, storage, and backups do not cross the same trust boundary.
- A public sector integrator uses a regulated enclave for project data and a separate enclave for routine business operations, then limits file transfer through approved gateways only.
- An NHI team places automation credentials for sensitive workloads inside the enclave rather than reusing the same API keys across shared cloud environments.
- A security review uses the separation guidance in the Ultimate Guide to NHIs alongside NIST SP 800-53 Rev 5 Security and Privacy Controls to test whether access paths, logging, and secret storage stay enclave-specific.
These use cases show that the enclave model is most useful when data sensitivity, regulatory scope, or supply chain exposure makes shared administration too risky.
Why It Matters in NHI Security
Enclave boundaries matter because NHIs often become the hidden bridge between environments. If service accounts, federated tokens, or automation workflows are allowed to reach multiple enclaves, the isolation model weakens and one compromise can become a multi-domain incident. NHIMG reports that only 5.7% of organisations have full visibility into their service accounts, which makes enclave-specific governance especially difficult when identities are scattered across tenants and teams. The same problem applies to secrets, because the boundary is only as strong as the weakest credential path.
In practice, enclave strategy also shapes incident containment, approval workflows, logging, and offboarding. A poorly defined enclave can create false confidence: teams assume sensitive data is protected while shared identities, permissive network routes, or unsanctioned collaboration tools silently undermine the separation. For deeper control thinking, NIST guidance on access control and system boundaries remains relevant, while the Ultimate Guide to NHIs highlights how NHI visibility and lifecycle gaps increase exposure across environments. Organisations typically encounter enclave weaknesses only after a cross-tenant access event, at which point the enclave approach becomes operationally unavoidable to address.
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 address the attack and risk surface, while NIST CSF 2.0, NIST Zero Trust (SP 800-207), NIST SP 800-63 and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Enclave designs depend on tight NHI scoping and isolation between trust zones. |
| NIST CSF 2.0 | PR.AC-4 | The term maps to restricting access to authorized users, devices, and processes. |
| NIST Zero Trust (SP 800-207) | 3.1 | Zero Trust requires explicit verification before allowing cross-boundary access. |
| NIST SP 800-63 | AAL2 | Identity assurance requirements influence how admin access is granted within enclaves. |
| NIST AI RMF | GOVERN | Risk governance is needed when enclave separation affects AI and data handling decisions. |
Apply enclave-specific access reviews and deny implicit trust across environment boundaries.
Related resources from NHI Mgmt Group
- How should organizations approach the governance of AI agents?
- Why do APIs need a different approach than user authentication for post-quantum readiness?
- When does OIDC federation work better than a vault-based approach?
- Why do identity systems need a different recovery approach than normal servers?
