IAM teams should measure where authentication design interrupts registration, not just whether login is secure. If redirects, consent prompts, or repeated handoffs cause users to abandon the journey, the identity control is failing to deliver its intended outcome. Completion rate, drop-off point, and assurance level should be reviewed together.
How to Measure Friction Without Missing the Point of Consumer Identity
For consumer identity journey, friction is not just a usability concern, it is a security signal. IAM teams should treat sign-in, registration, recovery, consent, and step-up challenges as one flow and ask where people fail to finish the journey. The right question is whether the control helps the business complete trusted access, not whether it adds more authentication steps.
That means measuring the control as an outcome, not as a feature count. A low-friction journey can still be weak if it allows account takeover or low-assurance access, while a highly secure flow can still be ineffective if it causes abandonment before the customer ever reaches the protected service.
What the Core Metrics Need to Show
Completion rate, drop-off point, and assurance level need to be reviewed together because each tells a different part of the story. Completion rate shows whether the journey is usable enough to finish. Drop-off point shows where design choices are interrupting progress, such as redirects, consent prompts, or recovery loops. Assurance level shows whether the resulting identity state is actually strong enough for the use case.
In practice, teams should break the journey into stages and compare success rates across them. Registration may be smooth until a verification step appears, or login may work until the user switches devices, loses access to a factor, or encounters repeated handoffs between apps and identity providers. Those are not just UX details, they are indicators that the security design is creating business friction.
- Track where users abandon the flow rather than only whether they eventually authenticate.
- Separate first-time enrollment, returning sign-in, recovery, and step-up events so one weak stage does not mask another.
- Review assurance outcomes alongside completion, because a fast but low-assurance journey can still be the wrong control.
Where Friction Becomes a Security and Business Problem
Consumer identity journeys often fail when the authentication design interrupts registration too often or too early. A repeated handoff may reduce completion, but it can also push users toward weaker recovery paths, reused passwords, or support-assisted workarounds. At scale, that creates a trade-off between access velocity and confidence that must be managed deliberately.
Identity teams should also watch for the difference between intentional friction and accidental friction. Step-up prompts, consent screens, and recovery checks can all be justified when they match risk, but they become counterproductive when they are triggered too frequently or in the wrong order. In those cases, the control is no longer serving assurance, it is degrading adoption and increasing the chance of unsafe user behaviour.
Risk and Threat Considerations
Excessive friction can cause users to abandon secure paths and take shortcuts, while too little friction can let attackers move through consumer identity journeys with stolen or replayed credentials. The risk is not only lost conversions, but also account takeover, recovery abuse, and the creation of unsafe fallback behaviours that weaken the identity layer over time.
Failure mechanism: Repeated redirects, consent prompts, or challenge loops break the journey, encourage user fatigue, and increase the chance that people choose weaker recovery or reauthentication paths.
Impact: Conversion drops, support load rises, and the organisation may end up with lower-assurance identities or more exploitable fallback channels than intended.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST SP 800-63, NIST CSF 2.0 and CIS Controls v8 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-63 | Digital Identity Guidelines | Consumer sign-in friction depends on assurance, authenticator choice, and recovery design. |
| Recommendation — Use assurance and authenticator guidance to balance security requirements against journey completion. | ||
| NIST CSF 2.0 | PR.AA-05 — Identity Management, Authentication, and Access Control | Sign-in friction is about how authentication and access controls affect user completion and assurance. |
| Recommendation — Measure identity control effectiveness with completion, drop-off, and assurance outcomes. | ||
| CIS Controls v8 | CIS-5 — Account Management | Consumer identity journeys rely on account lifecycle and login experience to keep access usable and controlled. |
| Recommendation — Tune account and recovery flows so security checks do not create avoidable abandonment. | ||
Practitioner Guidance
What to verify: Confirm that your telemetry can tie each abandonment point to a specific identity step, not just to the overall funnel. If you cannot tell whether users are failing at enrollment, verification, consent, or recovery, you cannot decide whether the problem is control design or journey design.
Decision rule: If adding an authentication step materially improves assurance but causes a measurable abandonment spike, treat it as a control trade-off and look for a better placement, a more appropriate trigger, or a less disruptive factor rather than simply removing the control.
What good looks like: The identity journey should feel predictable, with the minimum number of interruptions needed for the actual risk level. Users should complete registration or sign-in without being pushed into repeated loops, and the assurance outcome should still align with the business action being protected.
Practitioner takeaway: Evaluate sign-in friction as a control effectiveness problem, not a pure UX problem, and optimise for the smallest amount of interruption that still delivers the required assurance.
Related resources from NHI Mgmt Group
- How should security teams evaluate IAM platforms for non-human identity governance?
- How should security teams evaluate IAM tools beyond sign-in and MFA?
- How should IAM teams evaluate identity verification platforms for lifecycle governance?
- How should IAM teams evaluate identity server alternatives without focusing only on login features?