Who should decide when a digital credential is required instead of a passkey?

Why This Decision Matters for Security Teams

The choice between a passkey and a digital credential is not just an authentication preference. It determines what the system is actually proving: presence of a legitimate user, or possession of a verifiable attribute that a workflow must trust. Security teams get this wrong when they treat both as interchangeable login options, even though assurance, auditability, and downstream authorisation needs are different. The NIST SP 800-63 Digital Identity Guidelines make clear that identity proofing and authenticator choice are separate concerns, and NHIMG’s Ultimate Guide to NHIs — Static vs Dynamic Secrets shows why static trust assumptions break down once credentials are reused across systems. In practice, many security teams encounter misuse only after a workflow is already live and a weaker factor has been accepted as “good enough.”

How to Decide Which Control the Workflow Actually Needs

The practical question is whether the application needs a human to prove they are present, or whether it needs a portable statement about who or what they are allowed to be. A passkey is well suited to user presence and phishing resistance. A digital credential is better when the workflow depends on a verified attribute such as employment status, licence class, role membership, clearance, or device posture. Current guidance suggests making that choice at the application boundary, not inside the authentication stack.

Security, identity, and product owners should define the decision together using three checks:

• Does the action require a current attribute rather than just a login event?
• Must the application be able to verify the claim later for audit or policy decisions?
• Would a replayable credential create more risk than a local, phishing-resistant authenticator?

That distinction maps cleanly to standards thinking in the OWASP Non-Human Identity Top 10 and to control expectations in NIST SP 800-53 Rev. 5, where access control must align to the sensitivity and context of the protected action. For example, a passkey may unlock an employee portal, but a digital credential may be needed to assert licensure before a regulated workflow proceeds. If the workflow is machine-mediated, the same logic often extends to workload identity and short-lived assertions rather than a human-facing authenticator.

NHIMG research on the 2024 Non-Human Identity Security Report found that 59.8% of organisations see value in dynamic ephemeral credentials, which is a strong signal that static, one-size-fits-all credentialing is already under strain. These controls tend to break down when a single application mixes consumer login, workforce access, and regulated attribute checks because the trust model becomes ambiguous and hard to govern.

Common Variations and Edge Cases

Tighter credential requirements often increase operational friction, so organisations have to balance stronger assurance against user experience, issuance cost, and revocation complexity. There is no universal standard for this yet, especially where passkeys and digital credentials are both technically possible.

Common edge cases include step-up flows, delegated access, and regulated transactions. In those cases, a passkey may establish the session, then a digital credential may be used only when a high-assurance attribute is needed. That layered approach is often preferable to forcing every user through the highest-assurance path on every request. It is also consistent with Guide to the Secret Sprawl Challenge, which illustrates how over-broad trust increases blast radius when credentials are reused beyond their intended scope.

For B2B integrations, the same policy question can apply to service accounts, bots, and autonomous systems. In those environments, current best practice is evolving toward explicit trust decisions per workflow, not per identity label. Where the application must prove a regulated attribute at runtime, a digital credential is the safer choice. Where the main objective is phishing-resistant human sign-in, a passkey usually fits better. The decision should be documented as an assurance requirement, not left to implementation convenience. Organisations should revisit that choice whenever the workflow changes, because credential type often becomes misaligned after product teams add new claims, new regulators, or new downstream consumers.

Related resources from NHI Mgmt Group

• How can organizations manage the risk of credential leaks in MCP frameworks?
• Should organisations prioritise external exposure or internal credential governance first?
• How do security teams know if credential exposure screening is working?
• Why do digital signatures need governance beyond cryptography?