Prioritise passkeys when phishing, credential stuffing, or remote account takeover would create outsized business risk, especially for privileged, frontline, or shared-device users. They are most valuable where the organisation wants to reduce dependence on passwords without sacrificing usability. The strongest use cases are the ones where secret reuse has already become a liability.
Why This Matters for Security Teams
Authentication upgrades are not equal in risk reduction. Passkeys matter most when the business is exposed to phishing, credential stuffing, or replay attacks that target accounts with real operational power. That is especially true for privileged users, customer support staff, executives, and anyone working from shared or unmanaged devices. Unlike password resets or MFA prompts, passkeys remove the reusable secret that attackers most often abuse.
This is why the question is less about user convenience and more about attack path removal. If a team is still relying on passwords for high-impact accounts, it is leaving open the same failure modes seen in Schneider Electric credentials breach class incidents, where exposed credentials become an access pivot. NIST’s NIST Cybersecurity Framework 2.0 also reinforces that identity controls should be selected based on material risk, not technology fashion.
In practice, many security teams discover their weakest authentication path only after a phishing-led account takeover has already turned into lateral movement or fraud.
How It Works in Practice
Passkeys should be prioritised where they can eliminate the most dangerous authentication dependency first. The core gain is cryptographic, phishing-resistant authentication that binds login to the user’s device or authenticator rather than to a memorisable secret. That means there is no password database to steal and no shared secret to reuse across services. For many organisations, the best rollout starts with accounts that combine high privilege and high exposure, then extends to the broad user base once the operating model is stable.
Security teams usually evaluate the following conditions together:
- Whether the account is exposed to remote login from untrusted networks.
- Whether the user is a frequent phishing target or performs sensitive approvals.
- Whether the role uses shared devices, mobile workflows, or frontline access.
- Whether legacy MFA still depends on push approval, SMS, or one-time codes that can be phished or relayed.
Passkeys are strongest when paired with conditional access, device posture checks, and account recovery processes that do not reintroduce weak fallback paths. They also work best when the organisation reduces password use consistently, rather than allowing passkeys to exist as an optional layer on top of a fragile legacy stack. NIST guidance increasingly treats phishing-resistant authentication as the better default for high-risk access, and the practical implementation pattern is to reserve passkeys for the accounts where a single compromise would have disproportionate operational impact.
That is also why teams should map passkey priority to the organisation’s own exposure patterns, including third-party access and privileged workflows documented in Ultimate Guide to NHIs; identity risk compounds when access paths are multiplied across services, vendors, and administrative roles. The guidance breaks down when legacy applications cannot support modern authenticators and the fallback process still requires passwords or weak recovery factors.
Common Variations and Edge Cases
Tighter authentication often increases rollout friction, so organisations need to balance security gain against user support overhead and application compatibility. That tradeoff is real, especially in environments with older VPNs, thin-client estates, kiosk workflows, or regulated recovery procedures.
Best practice is evolving on how far passkeys should go in mixed environments. Current guidance suggests prioritising them first for accounts where phishing resistance matters most, then expanding once recovery, enrollment, and device binding are reliable. For example, executives and administrators usually justify immediate rollout, while high-volume temporary workers may need a different adoption path if device management is weak.
Passkeys are not a complete answer when an organisation still has:
- poor identity proofing during account recovery,
- shared credentials hidden behind legacy authentication gateways,
- unsupported systems that force password fallback, or
- service workflows that rely on machine credentials rather than human login.
That last point matters because some authentication decisions are really workload identity decisions, not human login decisions, and those should be handled separately. For human access, passkeys should be treated as a strong default for risk-prone accounts, not as a universal fix for every identity problem. They deliver the most value when they replace the very secret an attacker would otherwise steal and reuse.
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 |
|---|---|---|
| NIST CSF 2.0 | PR.AA-01 | Authentication strength should match account risk and exposure. |
| OWASP Non-Human Identity Top 10 | NHI-01 | Secret reuse and weak auth patterns are core identity exposure drivers. |
| NIST SP 800-63 | AAL2 | Passkeys align with stronger, phishing-resistant authenticator guidance. |
Replace reusable secrets on high-risk identities with phishing-resistant login and strong recovery controls.
