Who is accountable when passkey adoption fails to improve access security?

Why This Matters for Security Teams

Passkey adoption is often treated as a simple authentication upgrade, but failure usually reflects a broader control gap: unclear ownership, incomplete recovery design, and weak measurement of whether phishing resistance actually improved. The accountable parties are the identity and access management owner, security architecture, and authentication operations, because they define the rollout model and the exception path. NIST SP 800-53 Rev. 5 frames access control and authentication as managed controls, not one-time projects, and that matters when passkeys coexist with passwords, help desk recovery, and legacy device fleets.

For NHIs and agentic systems, the same pattern appears when credentials are not continuously governed. NHIMG notes that only 1.5 out of 10 organisations are highly confident in their ability to secure NHIs, which underscores how quickly confidence can outrun control. The lesson is that adoption numbers alone do not prove security improvement. In practice, many security teams discover the real failure only after fallback logins, recovery abuse, or phishing incidents continue despite a passkey rollout.

Relevant research from The State of Non-Human Identity Security and control guidance in NIST SP 800-53 Rev 5 Security and Privacy Controls both point to the same operational truth: security outcomes depend on governance, not branding.

How It Works in Practice

Accountability should be assigned across three layers. IAM owns the authentication policy and rollout sequence. Security architecture defines the assurance target, such as reducing password use, phishing exposure, and risky recovery paths. Authentication operations owns the day-to-day control plane, including enrollment support, device attestation checks, and fallback handling. If those responsibilities are not explicit, passkeys can become an additional login method rather than a security control.

Implementation should be measured against outcomes, not enrollment counts. Teams should track passkey adoption, password fallback rates, help desk recovery events, authentication failures, and incident trends. If users register passkeys but still sign in with passwords in high-risk scenarios, the control has not materially improved access security. Policy should also define which contexts require stronger verification, such as privileged accounts, admin consoles, or devices outside managed trust zones.

This is where identity governance and NHI lessons overlap. NHI programs fail when secrets are static, broadly usable, and poorly monitored; passkey programs fail when recovery and exception handling reintroduce the same weaknesses. NHIMG’s Ultimate Guide to NHIs and Ultimate Guide to NHIs — Key Challenges and Risks both reinforce that control owners must manage the whole lifecycle, not just the initial credential event. OWASP’s OWASP Non-Human Identity Top 10 is also useful here because it treats credential governance as an ongoing risk discipline.

These controls tend to break down in hybrid enterprises with unmanaged endpoints, inherited legacy directories, and broad help desk override rights because the recovery path becomes the easiest path back into the account.

Common Variations and Edge Cases

Tighter authentication controls often increase support overhead, requiring organisations to balance phishing resistance against usability, device compatibility, and recovery friction. That tradeoff is especially visible for contractors, executives, regulated workflows, and shared service desks where one bad exception can undo the whole program.

There is no universal standard for passkey rollout governance yet, but current guidance suggests that accountability should extend beyond IAM into business ownership when authentication is tied to regulated access or customer impact. If a line-of-business team insists on broad password fallback for convenience, that team should share accountability for the security outcome, not just the adoption metric. Likewise, if security architecture approves weak recovery options, it owns the resulting risk acceptance.

Passkeys also do not solve every access problem. They reduce phishing risk for interactive human sign-in, but they do not eliminate session hijacking, device compromise, or privileged access misuse. For privileged users, stronger controls may still require conditional access, step-up verification, and explicit fallback review. For environments with shared devices or offline workflows, the control can appear to “fail” simply because the rollout model was never fit for operating reality. In those cases, the accountable decision is not whether passkeys were deployed, but whether the control design matched the actual access pattern.

For broader identity governance context, Microsoft SAS Key Breach shows how weak key governance creates cascading exposure, while the 52 NHI Breaches Analysis illustrates the recurring pattern of control failure after token or credential misuse rather than before it.

Related resources from NHI Mgmt Group

• Why does identity and access management improve security and compliance in digital organisations?
• How should security teams run access reviews for non-human identities?
• How should security teams govern non-human identities that have persistent access?
• What is the difference between role-based access and API key governance for NHI security?