How should organisations decide when to use passkeys versus digital identity credentials?

Why This Matters for Security Teams

Passkeys and digital identity credentials solve different assurance problems, and confusing them leads to weak architecture. Passkeys are designed for strong account authentication, while digital credentials are built to prove a specific claim such as age, role, or regulated status. That distinction matters because security teams often try to use one control for both access and evidence, which increases friction and creates gaps in trust.

Current guidance from NIST SP 800-63 Digital Identity Guidelines supports matching identity proofing and authentication to the assurance level actually required. In NHIMG research, Ultimate Guide to NHIs shows how identity failures often stem from overloading a single credential type with too many responsibilities, especially when long-lived secrets and inconsistent lifecycle controls are involved. The same design mistake appears in human-facing identity programs when teams ask a login method to carry evidence, entitlement, and audit duties at once.

For practitioners, the core question is not which technology is newer. It is which assurance question must be answered at the point of use. In practice, many security teams encounter that mismatch only after onboarding, fraud review, or compliance evidence collection has already become painful.

How It Works in Practice

The decision starts by separating authentication from attribute presentation. A passkey proves that a user is the legitimate holder of a device-bound cryptographic credential, which is ideal for sign-in and step-up access. A digital identity credential proves a verifiable claim, often issued by a trusted authority, and can be used when the relying party needs evidence rather than just a login event. That is why the architecture should ask: is the system trying to admit a user, or verify a claim about them?

In a typical implementation, the application uses passkeys for account access and session creation, then requests a digital credential only when a transaction requires an attribute such as age verification, professional entitlement, or residency status. This keeps the login flow lean while preserving stronger assurance for regulated checkpoints. The pattern aligns with eIDAS 2.0 - EU Digital Identity Framework, which reflects a broader industry shift toward reusable identity assertions, and with OWASP Non-Human Identity Top 10, which reinforces the need to scope credentials tightly to the task they support.

• Use passkeys for account authentication, session initiation, and phishing-resistant sign-in.
• Use digital credentials when a business process needs a verified attribute or regulated proof.
• Keep credentials minimal: only the claims required for the transaction should be disclosed.
• Separate issuance, presentation, and revocation controls so compromise in one layer does not expose the others.
• Log the assurance decision, not just the login event, so auditors can see why the control was chosen.

NHIMG research also shows why overreliance on static secrets is dangerous: the 2024 Non-Human Identity Security Report found that 59.8% of organisations value dynamic ephemeral credentials, which reflects the same preference for short-lived, task-specific trust. These controls tend to break down when legacy platforms require one monolithic identity object for both access and attribute verification because the workflow cannot separate authentication from evidence exchange.

Common Variations and Edge Cases

Tighter identity separation often increases integration overhead, requiring organisations to balance user experience against assurance, revocation, and compliance requirements. That tradeoff becomes visible in customer onboarding, workforce access, and partner portals, where a single journey may need both sign-in and proof of eligibility.

There is no universal standard for this yet. Current guidance suggests using passkeys wherever phishing-resistant authentication is the only requirement, and using digital identity credentials only when the relying party genuinely needs a verifiable attribute. Some programmes will combine both, but the layers should remain distinct: passkey first for authentication, credential presentation second for claims.

Edge cases include offline verification, delegated access, shared devices, and jurisdictions with strict identity disclosure rules. In those environments, teams should be careful not to over-collect identity data simply because a credential can carry it. The Ultimate Guide to NHIs — Static vs Dynamic Secrets is a useful reminder that shorter-lived, purpose-bound assertions reduce blast radius, even though the operational model is still evolving for consumer identity ecosystems.

For most organisations, the safest pattern is simple: authenticate with passkeys, verify claims with digital credentials, and never ask one mechanism to substitute for the other unless the assurance requirement is explicitly narrow and well governed.

Related resources from NHI Mgmt Group

• How should organisations use digital credentials to verify identity and qualifications in high-trust workflows?
• How do organisations reduce the dwell time of exposed credentials at scale?
• How should organisations stop auto-sync from turning desktops into repositories of credentials?
• How should organisations decide when to use ISO 27001 versus ISO 27002?