Security teams should treat the shared account as the governed object and the passkey as the authentication method attached to it. That means assigning ownership, controlling enrolment, logging usage, and removing access when the user, device, or business relationship changes. Without those lifecycle controls, passkeys can improve login security while leaving accountability problems intact.
Why This Matters for Security Teams
Passkeys remove passwords from the login flow, but they do not remove governance responsibility. For shared application accounts, the security problem shifts from secret reuse to accountability: who enrolled the passkey, which device holds it, who can use it, and how access is removed when staffing or vendor relationships change. Current guidance suggests treating the account as the controlled asset and the passkey as one authentication method attached to it, not as proof that the account is intrinsically safe.
This distinction matters because shared accounts often sit outside normal user lifecycle controls, yet they still connect to sensitive systems, payment workflows, and administrative functions. If enrolment is informal, teams can lose visibility into which devices are trusted, whether the passkey is backed by platform sync, and whether recovery paths create an untracked bypass. That creates a governance gap even when phishing resistance improves. The NIST Cybersecurity Framework 2.0 is useful here because it reinforces identity governance, access control, and monitoring as ongoing functions rather than one-time setup tasks. In practice, many teams discover the problem only after a shared account owner leaves and no one can prove which passkey is still active.
How It Works in Practice
Governance starts by defining a clear owner for the shared account, a documented business purpose, and an approval path for every passkey enrolment. The account owner should be accountable for access, while the passkey itself is tracked as a registered authenticator with a named enrollee, device metadata, and a review date. That keeps the authentication method tied to lifecycle events even when multiple people need access.
Operationally, teams should require:
- Named ownership of the shared account and an explicit business justification.
- Controlled enrolment, with approval before a new passkey is added.
- Device-level inventory where possible, including which platform or security key holds the passkey.
- Logging for enrolment, authentication, recovery, and deletion events.
- Periodic review and removal when an employee changes role, a contractor offboards, or a vendor relationship ends.
This is consistent with the lifecycle emphasis in Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs, which treats access as something to be created, validated, rotated, and revoked. It also aligns with the broader NHI control problem described in Top 10 NHI Issues, where weak lifecycle discipline is a recurring failure mode. For shared accounts, passkey adoption should be paired with audit evidence, because the authentication method alone does not prove ongoing business need or appropriate delegation. These controls tend to break down when platforms allow silent passkey sync across multiple personal devices because ownership and revocation become harder to verify.
Common Variations and Edge Cases
Tighter passkey governance often increases operational overhead, requiring organisations to balance phishing resistance against support burden and access friction. That tradeoff becomes sharper in shared accounts used by rotating staff, call centres, outsourced operations, or emergency break-glass scenarios.
There is no universal standard for every recovery design yet, but best practice is evolving toward the same principle: minimise ambiguity about who can authenticate and who can approve changes. Where shared accounts must remain in use, teams should prefer one of three patterns: a managed group account with named enrolment records, an application-native delegation model that eliminates the share, or a privileged access workflow where passkey use is step-up authenticated and fully logged. For regulated environments, the audit question matters as much as the technical one. The PCI DSS v4.0 and Ultimate Guide to NHIs — Regulatory and Audit Perspectives both point toward evidence of access control, review, and revocation. A passkey that can be silently re-enrolled after offboarding is still a governance failure, even if the login itself is phishing-resistant.
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 SP 800-63 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Shared accounts need ownership, lifecycle, and revocation controls for attached authenticators. |
| NIST CSF 2.0 | PR.AA | Identity proofing, authentication, and access control apply to shared account passkey governance. |
| NIST SP 800-63 | Digital identity guidance informs authenticator binding, lifecycle, and reauthentication expectations. |
Assign owners, inventory passkeys, and revoke enrolments when account purpose or personnel changes.
Related resources from NHI Mgmt Group
- How should security teams govern non-human identities alongside human accounts?
- How should security teams govern Active Directory service accounts?
- How should security teams govern social media accounts that do not support standard IAM integration?
- How should security teams govern social media accounts that sit outside IAM?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on June 24, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
