When do passkeys deliver the most value in an IAM programme?

Why This Matters for Security Teams

Passkeys deliver the most value when an IAM programme needs to cut phishing risk and reduce password handling at scale, especially for user populations that repeatedly fall back to weak MFA, password resets, or help desk recovery. Their value is not just stronger authentication, but fewer opportunities for credential theft and fewer inherited password problems. NIST’s NIST SP 800-53 Rev 5 Security and Privacy Controls remains useful here because authentication strength only matters when the surrounding recovery and access controls are equally disciplined.

That is why passkeys tend to produce the biggest gain in high-volume user journeys where phishing and reuse are routine, not in environments where the real weakness is overprivileged accounts, missing lifecycle controls, or poor device governance. The security uplift is strongest when enrollment is easy, recovery is tightly governed, and legacy passwords can be retired rather than left as a parallel fallback. NHI Management Group’s Ultimate Guide to NHIs shows how often identity programmes fail when controls are incomplete: 97% of NHIs carry excessive privileges, which is a reminder that authentication improvements do not fix bad authority design. In practice, many security teams encounter passkey resistance only after exception handling and reset flows have already recreated the same risk they were trying to remove.

How It Works in Practice

Passkeys work best when they are deployed as part of a broader identity simplification effort, not as a standalone login upgrade. They replace shared password secrets with cryptographic authenticators bound to the user device, which significantly reduces phishing exposure and credential replay. For IAM teams, the operational question is whether the programme can support enrollment, device binding, recovery, and fallback without reintroducing the very weaknesses passkeys were meant to remove.

In practice, the highest-value deployments usually share four traits:

• They target broad, repetitive sign-in populations first, such as employees or contractors with common SaaS access patterns.
• They align recovery with strong identity proofing and help desk controls, so password reset is not the default escape hatch.
• They remove or sharply restrict legacy authentication paths rather than leaving passwords active indefinitely.
• They monitor exception rates, because a small number of unsupported workflows can create a large residual risk.

This is where passkeys often intersect with other identity hygiene. If an organisation still stores secrets in weak places, rotates credentials poorly, or allows excessive standing access, passkeys only solve the front door. NHI Management Group’s Azure Key Vault privilege escalation exposure illustrates how privilege and secret handling issues can persist even when authentication improves. For programme design, current guidance suggests using passkeys where user friction and phishing pressure are highest, while pairing them with lifecycle, recovery, and device assurance controls. These controls tend to break down in regulated or shared-device environments because recovery exceptions, kiosk usage, and legacy app dependencies force password fallback.

Common Variations and Edge Cases

Tighter passkey adoption often increases rollout and support overhead, requiring organisations to balance security gains against compatibility, recovery complexity, and user experience. That tradeoff matters because not every identity population benefits equally from passkeys, and not every application can absorb a passwordless change at the same pace.

One common edge case is workforce segmentation. Knowledge workers with managed devices and modern browsers usually gain the most, while frontline staff, shared-device users, or third-party populations may need different enrollment and recovery models. Another is application dependency. Older systems, device-constrained workflows, or federated legacy platforms may still require transitional authentication methods, which means passkeys should be introduced as a staged control rather than a big-bang replacement.

There is also no universal standard for exactly when to force password retirement versus keeping it as a break-glass option. Best practice is evolving, but the general direction is clear: the more often users authenticate through phishing-resistant methods, the more value the programme captures. NIST’s security control guidance is most effective when paired with operational discipline, not treated as a checkbox. Organisations that still depend on high-friction manual recovery or broad fallback access often see the benefits diluted quickly. The biggest weak point is usually not the passkey itself, but the recovery path that remains open for every user who cannot complete enrollment or device binding.

Related resources from NHI Mgmt Group

• Where does cross-environment agent discovery fit in an IAM programme?
• Why do conditional UI passkeys matter for human IAM programmes?
• What should organisations review before introducing secure key storage into an IAM programme?
• Why do passkeys still need adaptive MFA in enterprise IAM programmes?