They often treat passkeys as a user-enrolment project instead of an authentication governance change. The hard part is defining which users, apps, and transaction types can accept each authenticator, then enforcing that policy consistently across mixed environments.
Why This Matters for Security Teams
Passkeys are often marketed as a phishing-resistant replacement for passwords, but IAM teams get into trouble when they treat adoption as a pure enrolment exercise. The real problem is policy: deciding which authenticator is acceptable for which app, user population, and transaction risk level, then making that decision hold across cloud, on-prem, and legacy systems. That is an access governance problem, not a UX rollout. NIST’s guidance on identity assurance and federation is useful here, but passkeys still need explicit policy boundaries to avoid becoming a blanket exception to stronger controls, as outlined in the NIST Cybersecurity Framework 2.0. NHI Mgmt Group research shows that many organisations already struggle to apply consistent identity governance in hybrid estates, with 35.6% citing consistent access across hybrid and multi-cloud environments as their top NHI security challenge. The same governance gap appears when passkeys are introduced without transaction-level rules, fallback controls, or auditability. In practice, many security teams encounter passkey exceptions only after an account recovery path, privileged workflow, or legacy app has already bypassed the intended policy.
How It Works in Practice
A workable passkey programme starts by classifying authentication journeys, not by issuing credentials as fast as possible. The team should separate low-risk sign-in, high-risk admin access, step-up authentication, and recovery flows, then define which authenticators are allowed in each case. That usually means passkeys for primary sign-in, stronger controls for privileged actions, and tightly governed recovery for lost devices or new hardware. Current guidance suggests treating passkeys as one input into a broader access policy model, not as a universal trust signal, and mapping those decisions to the organisation’s control framework such as NIST Cybersecurity Framework 2.0.
Operationally, that requires:
- clear app-by-app acceptance rules for passkeys, phishing-resistant MFA, and fallback methods
- transaction-based step-up policies for payments, admin tasks, data export, and support actions
- device and session signals that influence whether a passkey assertion is sufficient
- central logging so security teams can see when a weaker path was used and why
This is where NHI governance lessons transfer cleanly. Identity controls fail when organisations assume the credential itself is the control. As NHI Mgmt Group notes in the Azure Key Vault privilege escalation exposure analysis, over-trusting a mechanism without governing its surrounding permissions creates privilege paths that are hard to spot until they are abused. The same pattern applies to passkeys: if recovery, enrollment, and admin elevation are loose, the strongest authenticator can still be undermined by the weakest workflow. These controls tend to break down in mixed estates with legacy SSO, shared admin consoles, and business units that insist on local exceptions because policy enforcement becomes inconsistent across every exception path.
Common Variations and Edge Cases
Tighter passkey policy often increases rollout friction, requiring organisations to balance phishing resistance against support load, device diversity, and business continuity. That tradeoff is real, especially where contractors, shared workstations, or regulated operations make device-bound authentication harder to standardise. Best practice is evolving on fallback design, but there is no universal standard for whether SMS, email, or help-desk recovery should be allowed for any given population; the safer approach is to scope fallback by risk and continuously review it. The Azure Key Vault privilege escalation exposure case is a reminder that recovery and exception handling often become the real attack surface, not the primary control.
Teams also miss the edge case of privileged users who can authenticate successfully but still should not be allowed to complete certain transactions without step-up verification. That distinction matters for finance, HR, support, and infrastructure admins. Passkeys reduce phishing risk, but they do not remove the need for RBAC, JIT access, PAM, or explicit transaction approval. The practical goal is not “passkeys everywhere,” but “passkeys where they fit, plus policy where they do not.” Where device trust is poor, user populations are highly variable, or legacy apps cannot consume modern federation signals, the policy model tends to fragment unless governance is enforced centrally.
