Passkeys remove the reusable secret that attackers usually target, so the main risks shift toward device trust, recovery abuse, and fallback methods. That means customer identity teams need to govern the whole journey, not just the authentication step, if they want the security gains to hold.
Why This Matters for Security Teams
Passkeys change customer identity risk because they remove the reusable shared secret that attackers have historically phished, replayed, or bought from a leak. That is a real improvement, but it also shifts the control surface. Teams now have to account for device trust, account recovery, enrollment, and fallback paths such as SMS, email links, or help desk intervention. NIST’s Cybersecurity Framework 2.0 is useful here because it frames identity as an ongoing risk-management problem, not a login-only event.
NHI Management Group’s research shows how often organisations underestimate identity exposure in practice: the Ultimate Guide to NHIs reports that 79% of organisations have experienced secrets leaks, and 77% of those incidents caused tangible damage. While passkeys reduce one class of secret leakage for customers, the broader lesson is the same. Identity risk migrates to the weakest adjacent control, not the strongest authentication factor.
That is why customer identity teams should treat passkeys as a governance change, not just an auth upgrade. In practice, many teams discover their real exposure only after recovery flows, onboarding exceptions, or call-centre procedures are abused at scale, rather than through intentional design.
How It Works in Practice
In a passkey model, the user proves possession of a cryptographic key pair stored on a device, often with biometrics or a local PIN to unlock it. The server keeps the public key, so there is no reusable password for attackers to steal and reuse elsewhere. That lowers phishing and credential-stuffing risk, but it does not eliminate identity compromise. The attack path simply moves to device binding, session handling, recovery, and account linking.
Security teams should map the full customer identity journey and ask where trust is granted, extended, and revoked. This usually includes registration, passkey enrollment, device syncing, recovery, and step-up authentication. The Ultimate Guide to NHIs — Key Challenges and Risks is about non-human identity governance, but the operational pattern is directly relevant: the risk is rarely the credential alone, it is the lifecycle around it.
- Prefer passkeys as the primary factor, but keep fallback methods narrowly scoped and risk-aware.
- Use device signals, session age, and behavioural context to decide when step-up is required.
- Treat recovery as a privileged workflow with strong verification, audit logging, and rate limits.
- Review account linking and passkey migration logic for abuse paths that could bind the wrong device to the right account.
- Measure help desk and support channels as identity controls, not just service operations.
Current guidance suggests passkeys work best when recovery is designed as carefully as login. These controls tend to break down in high-volume consumer environments with weak account proofing, because social engineering and support-channel abuse become the primary compromise path.
Common Variations and Edge Cases
Tighter passkey adoption often increases recovery friction, so organisations have to balance lower phishing risk against higher support complexity. That tradeoff is especially visible for consumer products, shared-device environments, and markets where device turnover is high. Best practice is evolving, and there is no universal standard for how much fallback access is acceptable.
One common edge case is passkey sync across multiple devices. Syncing improves usability, but it can also widen the trust boundary if an attacker compromises the user’s ecosystem account or recovery channel. Another issue is legacy fallback. If SMS, email, or knowledge-based verification remains available, attackers will target the weakest option rather than the passkey itself. That is why many teams now pair passkeys with stronger identity proofing and tighter recovery thresholds, rather than treating passkeys as a complete replacement for governance.
For a broader view of identity exposure patterns, the 52 NHI Breaches Analysis and the Top 10 NHI Issues show a consistent lesson: the control that removes the obvious secret often exposes governance gaps elsewhere. That same pattern applies to customer passkey programmes when product, support, and security teams do not align on lifecycle controls.
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 AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | PR.AA | Passkeys shift identity risk from passwords to authentication lifecycle controls. |
| OWASP Non-Human Identity Top 10 | NHI-04 | Fallback and recovery paths create identity risk similar to weak secret handling. |
| NIST AI RMF | Customer identity decisions must account for changing risk across the full journey. |
Align passkey rollout to PR.AA by governing enrollment, authentication, recovery, and fallback paths.
