They fail when teams move profile data but lose the cryptographic or verification state that makes the authenticator usable. A copied user record is not enough if the public key, verified factor status, or default method is missing. In those cases, the login experience breaks even though the migration looks complete.
Why This Matters for Security Teams
Passkey migrations fail most often because teams treat them like ordinary profile moves, then discover that authentication depends on more than a copied user row. The record may exist, but the verifier, registered public key, default authenticator choice, or assurance state may not. That gap is especially painful in environments with recovery workflows, delegated administration, or staged cutovers.
From a security perspective, the issue is not just usability. A broken migration can create account lockouts, force weak fallback methods, or trigger support-driven resets that bypass intended assurance controls. Guidance from the NIST Cybersecurity Framework 2.0 still applies here: identity data must be protected as part of the service, not treated as a passive database object. NHIMG has also shown how quickly credential-related weaknesses become operational exposure in the LLMjacking research, where compromised NHIs are exploited once the control plane loses trust boundaries.
In practice, many security teams discover migration defects only after users cannot authenticate on day one, rather than through intentional validation of the passkey state before cutover.
How It Works in Practice
A successful passkey migration has to preserve the cryptographic relationship between the user, the relying party, and the registered authenticator. A copied profile may include names, emails, and roles, but if the new system does not carry forward the credential binding, the login path has nothing usable to verify. That is why migration design should distinguish between identity attributes and authentication state.
Practitioners typically validate four things before cutover: the credential object itself, the public key or key handle, the factor’s verified status, and the user’s default or preferred method. If any of those are missing, the system may still show the account as migrated while refusing the actual login. Current guidance suggests treating passkey data as security state, not application metadata, and documenting which fields are authoritative in source versus destination systems.
- Confirm the exported record includes the passkey binding, not just the profile.
- Map whether the authenticator is device-bound, synced, or enterprise-managed.
- Preserve verification flags so the destination knows the factor is already trusted.
- Test fallback paths so recovery does not silently weaken the assurance level.
Where implementations are mature, teams rehearse migration in a staging tenant, compare source and destination authentication responses, and validate that recovery does not promote an unverified method to default. The State of Secrets in AppSec research is relevant here because migration failures often come from fragmented identity and secrets handling, not from a single broken field. Best practice is evolving, but a reliable test is whether the new environment can prove the same factor at runtime, not merely store its record.
These controls tend to break down when the destination platform normalises identity data but discards authenticator metadata, because the account appears present while the credential cannot be asserted.
Common Variations and Edge Cases
Tighter passkey controls often increase migration overhead, requiring organisations to balance assurance against delivery speed. That tradeoff matters because not every passkey deployment is managed the same way, and current guidance is not fully standardised across vendors or platforms.
One common edge case is synced passkey. If the user’s authenticator is stored in a platform sync layer, a migration may not need to move the key material at all, but it still must preserve the account linkage and enrolment context. Another edge case is account recovery: if the old method is removed before the new one is confirmed, the organisation may create a lockout that looks like a migration success in the admin console.
There is also a difference between migration and re-enrolment. Some environments cannot safely transfer the existing passkey state, so the right answer is to force re-registration with strong verification rather than attempt a partial copy. That approach is often safer, but it can be unpopular with user-facing teams because it adds friction. For broader identity architecture, the DeepSeek breach is a reminder that exposed or mishandled authentication-related data can scale quickly once state integrity is lost.
In short, migration succeeds only when the destination can prove the same trust conditions, and fails when copied records are mistaken for usable authentication state.
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 Zero Trust (SP 800-207) and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-03 | Credential rotation and state integrity matter when passkey bindings are migrated. |
| NIST CSF 2.0 | PR.AA-1 | Identity proofing and authentication assurance apply to passkey cutovers. |
| NIST SP 800-63 | AAL2 | Passkeys are authentication factors that must retain assurance properties after migration. |
| NIST Zero Trust (SP 800-207) | PR.AC | Zero trust requires each authentication event to be verifiable, not assumed from records. |
| NIST AI RMF | Assurance and governance principles apply to authentication changes in digital systems. |
Verify passkey state is preserved and re-register anything the destination cannot validate.
