Start by separating entitlement from authentication. Define who should have access, then use stronger proofing methods such as biometrics or step-up verification to confirm the right user. Keep location and device checks as supporting signals, not the main decision. That approach reduces misuse without turning every login into a support event.
Why This Matters for Security Teams
password sharing is often a symptom of brittle access design, not just bad user behaviour. When teams rely on shared logins, they lose attribution, make offboarding harder, and create hidden privilege paths that bypass normal review. That matters even more in environments that already struggle with secret sprawl, where the Ultimate Guide to NHIs notes that 96% of organisations store secrets outside of secrets managers in vulnerable locations.
The practical goal is to remove the incentive to share credentials without forcing every user through a high-friction challenge on every sign-in. Current guidance suggests separating entitlement from authentication, then using stronger proofing only when risk justifies it. That aligns with the broader access governance direction in the NIST Cybersecurity Framework 2.0, where access control should be measurable, risk-aware, and tied to business needs rather than convenience shortcuts.
In practice, many security teams discover password sharing only after an audit, incident, or support escalation has already exposed how many workflows depended on it.
How It Works in Practice
The cleanest pattern is to reduce dependence on passwords by improving both entitlement design and step-up verification. First, define access at the role or task level so users request what they need, rather than borrowing a colleague’s login. Then use stronger proofing methods, such as biometrics, device-bound authentication, or step-up MFA, to confirm the right person when the action is sensitive.
For lower-risk activity, keep login friction modest. For higher-risk activity, add context-aware checks such as device posture, location anomalies, impossible travel, or unusual transaction patterns. Those signals should support the decision, not replace the core identity proof. That distinction matters because location alone is a weak proxy for trust, and device checks are only useful when they are combined with policy decisions that can be enforced consistently.
- Use unique user accounts instead of shared credentials wherever attribution matters.
- Apply RBAC to remove ad hoc permission requests that encourage sharing.
- Use step-up verification only for privileged actions or unusual sessions.
- Prefer passwordless or phishing-resistant methods where supported.
- Review access logs for repeated logins from multiple users on the same account.
For teams managing broader identity hygiene, the NHIMG research in the Ultimate Guide to NHIs shows how quickly weak credential practices scale into systemic exposure. The operational lesson is that better identity proofing reduces both misuse and the pressure to share. These controls tend to break down in legacy applications that cannot support per-user authentication or step-up challenges because shared service workflows were built into the application design.
Common Variations and Edge Cases
Tighter authentication often increases support overhead, so organisations have to balance stronger proofing against user experience and app compatibility. The right answer is not to remove safeguards, but to apply them selectively where the risk justifies the interruption.
One common edge case is kiosk, shift-based, or front-line environments where multiple staff members use the same device. In those cases, current guidance suggests session switching, badge-based re-authentication, or short-lived access tokens instead of shared passwords. Another edge case is third-party access, where teams may be tempted to reuse internal accounts for convenience. That usually creates more risk than it saves.
Best practice is evolving for biometrics and device trust as primary controls. They work well when paired with phishing-resistant authentication and clear recovery processes, but they should not become an excuse to weaken entitlement review. The NIST CSF perspective and NHIMG’s broader NHI guidance both point to the same operational principle: reduce standing trust, minimise reusable secrets, and make every access path attributable.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 address the attack and risk surface, while NIST CSF 2.0 and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | PR.AA-01 | Identity proofing and access control are central to reducing shared-password behaviour. |
| OWASP Non-Human Identity Top 10 | NHI-01 | Shared passwords create the same secret-handling risk patterns seen in weak NHI practices. |
| NIST AI RMF | Risk-based authentication should adapt to context while limiting unnecessary user friction. |
Use unique identities, step-up verification, and access reviews to replace shared credentials with attributable access.
Related resources from NHI Mgmt Group
- How should government teams reduce resident account takeover without adding too much login friction?
- How can IAM teams make authentication stronger without adding too much friction?
- How should security teams implement just-in-time access without creating too much friction?
- How should security teams implement context-aware authentication without creating too much user friction?
