Shared ownership means more than one accountable person can manage and attest to a machine identity. It reduces governance dependency on a single employee and helps preserve approvals, certifications, and audit continuity when staff are absent or change roles.
Expanded Definition
Shared ownership is a governance pattern for NHIs in which more than one accountable person can approve, attest, review, and, where authorized, remediate a machine identity. It is not the same as casual group access; it requires named accountability, documented control boundaries, and audit-ready evidence of who can act on the identity and under what conditions.
In NHI operations, shared ownership matters because machine identities outlive individual employees and often span application teams, security, platform engineering, and compliance. A practical design usually separates duties between primary and secondary owners, with clear approval paths for rotation, secret updates, and exception handling. That approach aligns well with the governance intent of the NIST Cybersecurity Framework 2.0, even though no single standard uses one universal definition of shared ownership yet. NHI Management Group discusses the broader lifecycle and governance problem in the Ultimate Guide to NHIs.
The most common misapplication is treating shared ownership as “anyone on the team can handle it,” which occurs when approvals are not tied to named stewards or when audit records do not show who actually attested to the identity.
Examples and Use Cases
Implementing shared ownership rigorously often introduces coordination overhead, requiring organisations to balance continuity and resilience against slower change control and clearer accountability boundaries.
- A production API key has a primary application owner and a secondary security owner, so rotation can still happen during vacations, role changes, or incident response.
- A service account used by a payment workflow is jointly attested by platform engineering and the application team, with both approvals preserved in the audit trail.
- A CI/CD secret is managed by the deployment team and overseen by security, reducing the chance that one departed engineer can block remediation.
- An external-facing integration follows a shared ownership model between vendor management and the system owner, helping ensure third-party access is reviewed on schedule.
- During offboarding, shared ownership allows one accountable reviewer to revoke or reassign credentials even if the original owner is unavailable, which is a recurring lifecycle issue highlighted in the Ultimate Guide to NHIs.
For implementation context, identity governance guidance from the CISA Zero Trust Architecture resources reinforces the value of distributing responsibility without losing control of privilege.
Why It Matters in NHI Security
Shared ownership reduces single-person dependency, which is one of the most common operational weaknesses in NHI security. When only one employee can approve or attest to a machine identity, rotation stalls, orphaned credentials persist, and audit evidence becomes fragile during absences, reorganisations, or incidents. That is especially dangerous in environments where NHIs are already abundant and under-governed. NHI Management Group reports that only 20% of organisations have formal processes for offboarding and revoking API keys, which makes continuity of accountability a practical security requirement rather than a convenience.
Shared ownership also supports Zero Trust execution because access decisions, attestation, and remediation must remain possible even when one person is unavailable. The concept fits naturally with the NIST view that identity governance, access control, and lifecycle management are continuous functions rather than one-time events. Organisations typically encounter the consequences only after a departure, failed rotation, or incident review exposes that no second accountable owner exists, at which point shared ownership 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 and NIST Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Shared ownership supports accountable NHI stewardship and reduces single-owner dependency. |
| NIST CSF 2.0 | PR.AA | Identity and access governance depends on continuous accountability for managed identities. |
| NIST Zero Trust (SP 800-207) | PE-3 | Zero Trust implementation requires resilient identity administration and policy enforcement. |
Ensure multiple authorized operators can attest and remediate NHI controls without creating broad privilege.
