Who is accountable for authentication trust when passkeys are deployed outside the cloud?

Accountability remains with the organisation that owns the identity architecture, not the technology trend itself. Security, IAM, and infrastructure teams must ensure the authentication system aligns with sovereignty, privacy, and operational resilience requirements. That includes deciding where keys live, how logs are retained, and who can administer the trust boundary.

Why This Matters for Security Teams

Passkeys do not remove accountability for authentication trust. They change the mechanism, but the organisation still owns the control boundary: device policy, key storage, attestation decisions, recovery flows, logging, and administrative access. That matters most when passkeys are deployed outside the cloud, because sovereignty, privacy, and regulator-facing assurance can vary by jurisdiction and hosting model.

Security teams often assume passkeys are inherently safer and therefore operationally self-governing. That is not how authentication risk works in practice. The trust question shifts to where the cryptographic material is bound, who can revoke it, and how identity proofing and recovery are governed when a platform spans on-premises, mobile, and third-party services. NIST’s NIST SP 800-53 Rev 5 Security and Privacy Controls remains relevant because authentication trust is still a control responsibility, not a product feature.

NHIMG research shows the broader pattern: 88.5% of organisations say non-human IAM practices lag human IAM, and that same governance gap tends to appear when authentication ownership is assumed rather than assigned, especially after incidents like the Snowflake breach and 230M AWS environment compromise. In practice, many security teams discover authentication trust gaps only after recovery paths, audit logs, or admin privileges have already been contested.

How It Works in Practice

Accountability for passkeys outside the cloud should be assigned to the organisation that controls the identity architecture and the trust policy, not to the platform provider or the passkey format itself. That means IAM, security architecture, platform engineering, and infrastructure operations need a shared control model that defines where private keys are generated or synced, what devices are eligible, how local biometric or PIN unlock is trusted, and how recovery is approved.

In practice, this usually breaks into four operational decisions:

• Who defines the relying party trust rules and approved authenticators.
• Where passkey material is stored, backed up, and restored, especially in BYOD or managed-device environments.
• How administrative access to the trust boundary is separated from day-to-day user access.
• How logs, attestation evidence, and recovery actions are retained for audit and incident response.

For governance teams, the right comparison is not “cloud versus outside cloud” but “who can prove trust and who can change it.” ISO/IEC 27001:2022 asks organisations to treat identity controls as managed risk, while implementation guidance should reflect the same discipline used for Azure Key Vault privilege escalation exposure and the credential abuse patterns seen in Hard-Coded Secrets in VSCode Extensions. If passkeys are accepted from unmanaged devices, the organisation must also decide whether assurance comes from device attestation, MDM posture, or additional step-up controls. These controls tend to break down when recovery is delegated to help desks without strong identity proofing, because account takeover then follows the weakest support workflow rather than the strongest cryptographic authenticator.

Common Variations and Edge Cases

Tighter passkey governance often increases friction for users and service desks, so organisations must balance assurance against recovery speed and cross-border usability. Current guidance suggests that outside-cloud deployments need extra care where sovereignty, offline operation, or regulated data residency limits centralised identity services, but there is no universal standard for this yet.

One common edge case is hybrid identity: a passkey may be issued by one environment but relied on by another through federation. That creates a split in accountability unless the trust chain, logging, and revocation path are contractually and technically mapped end to end. Another edge case is shared device or kiosk use, where passkeys may be technically possible but operationally poor because user binding is weaker and local device control is inconsistent.

In cloud-independent environments, the hardest questions are often recovery and revocation, not initial enrollment. If a device is lost, a user changes roles, or a jurisdiction requires different evidence retention, the organisation must still be able to prove who approved the trust change and why. That is why accountability should sit with the entity that can administer and audit the trust boundary, even when the passkey itself lives elsewhere.

Related resources from NHI Mgmt Group

• How should security teams prioritise NHI remediation in cloud environments?
• How should security teams govern non-human identities in cloud environments?
• How do passkeys fit into step-up authentication and zero trust?
• Who is accountable when alternate login methods are left enabled after stronger authentication is deployed?