Passkeys remove the shared secret that phishing, replay, and password reuse depend on. That reduces credential theft risk, but it also shifts governance toward device assurance, recovery processes, and user lifecycle handling. The main challenge becomes whether the identity programme can manage the authenticator end to end without creating new exceptions.
Why Passkeys Change the Security Equation
Passkeys remove the shared secret that attackers routinely steal through phishing, reuse, and replay, so they do materially improve human authentication. The shift is not simply “stronger login.” It changes where identity risk concentrates: device trust, recovery, enrollment, and account lifecycle controls. NIST Cybersecurity Framework 2.0 treats identity assurance as a program issue, not just an authentication feature, and that framing fits passkeys well.
For security teams, the main mistake is assuming passkeys eliminate identity fraud rather than relocating it. If an attacker cannot steal a password, they may target the device, the help desk, recovery channels, or the sync layer that restores the credential. That makes governance around authenticators, trusted devices, and exception handling more important than ever. The broader risk picture is familiar to anyone who has studied credential abuse in the Ultimate Guide to NHIs and the attack patterns documented in 52 NHI Breaches Analysis.
In practice, many security teams encounter the failure only after recovery flows, device resets, or exception paths have already become the easiest way back into the account.
How Passkeys Reshape Identity Operations
Passkeys work best when treated as a lifecycle control, not a one-time enrollment project. The identity programme must know which devices are allowed to create and use authenticators, how those devices are assessed, and how the organization will recover access without weakening assurance. That often means pairing passkeys with conditional access, device posture checks, and strong administrative workflows for enrollment and revocation. Current guidance suggests that the authentication factor and the device state should be evaluated together, because a passkey on an unmanaged device does not provide the same assurance as a passkey on a governed corporate endpoint.
Operationally, the change shows up in five places:
- Enrollment: confirm the user, the device, and the recovery route before issuing a passkey.
- Device assurance: define which operating systems, sync services, and endpoint states are acceptable.
- Recovery: make account recovery harder to exploit than normal login, but still usable for genuine users.
- Lifecycle: revoke or rebind authenticators when devices are lost, replaced, or reassigned.
- Exceptions: track fallback methods so they do not become a hidden password equivalent.
That governance lens aligns with the NIST view of identity proofing and authenticator assurance in NIST Cybersecurity Framework 2.0, and it is consistent with the NHI lifecycle discipline described in the Ultimate Guide to NHIs — Key Challenges and Risks.
Passkeys reduce credential theft, but they do not remove the need for identity governance, because attackers often shift to recovery abuse, device compromise, or session hijacking when passwords disappear.
Where the Tradeoffs and Edge Cases Appear
Tighter passkey governance often increases support overhead, requiring organisations to balance phishing resistance against recovery friction and device-management complexity. That tradeoff is especially visible in bring-your-own-device environments, contractor populations, and mergers where multiple identity stacks coexist. Best practice is evolving here, and there is no universal standard for how much recovery flexibility is too much.
One common edge case is shared or kiosk devices. Passkeys are designed around possession of a bound authenticator, so shared endpoints can force awkward exceptions that weaken the assurance model. Another is account recovery for users who lose both their device and their recovery method. If the fallback path is too permissive, the organisation reintroduces the very weaknesses passkeys were meant to reduce. If it is too strict, support teams create shadow processes that are even less controlled.
Passkeys also interact with federation and legacy applications in uneven ways. Some applications will still depend on passwords, OTPs, or step-up methods, which creates a mixed estate where the weakest path often defines the real risk. Security teams should map every fallback and legacy route, not just the passkey path, and should monitor whether users are being pushed into exceptions that bypass policy. This matters because identity programmes rarely fail at the main login screen; they fail in the recovery and exception paths that are easiest to normalize over time.
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 SP 800-63, NIST AI RMF and NIST Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | PR.AA-01 | Passkeys change authenticator assurance and identity lifecycle governance. |
| NIST SP 800-63 | AAL2 | Passkeys are an authenticator choice that affects phishing resistance and recovery assurance. |
| OWASP Non-Human Identity Top 10 | NHI-03 | The same lifecycle discipline applies when authenticators and recovery secrets are managed as identities. |
| NIST AI RMF | GOVERN | Identity risk shifts to governance of devices, recovery, and exception handling. |
| NIST Zero Trust (SP 800-207) | PL-2 | Passkeys fit Zero Trust only when device trust and access decisions are continuously evaluated. |
Classify passkeys by assurance level and tie enrollment, recovery, and revocation to identity governance.
