Passwordless authentication is safer, but identity risk shifts

At a glance

What this is: This is an analysis of passwordless authentication and the control gaps that still create identity risk even after passwords are removed.

Why it matters: It matters because IAM teams can reduce one attack path while leaving device, lifecycle, and trust assumptions untouched across human, NHI, and autonomous identity programmes.

👉 Read Axiad's analysis of whether passwordless authentication is safe

Context

Passwordless authentication reduces dependence on shared, stolen, or weak passwords, but it does not remove identity risk. The real question for IAM teams is where trust moves when the password disappears, especially across device-based logins, biometric verification, and broader access governance.

For identity programmes, the issue is not whether passwords are obsolete. It is whether authentication, device assurance, and offboarding controls are aligned tightly enough that the new method does not simply relocate the failure point into a different part of the identity stack.

Key questions

Q: How should security teams implement passwordless authentication without creating new identity gaps?

A: Start by binding passwordless to a managed trust anchor such as a device, certificate, or hardened authenticator, then define revocation and recovery paths for every method. The rollout should be complete across the relevant apps and privileged workflows, because partial adoption creates inconsistent assurance and makes governance harder, not easier.

Q: Why does passwordless authentication still leave organisations exposed to identity risk?

A: Because the password is only one trust mechanism. Once it is removed, risk moves to the device, biometric factor, certificate, or fallback process that now proves identity. If those controls are weak or inconsistently governed, attackers can still gain access through stolen devices, abused recovery flows, or unmanaged credentials.

Q: What breaks when passwordless is rolled out only to part of the environment?

A: A partial rollout creates two assurance models at once. Some users and applications rely on passwordless factors while others still depend on passwords or fallback methods, which complicates policy enforcement, support, and incident response. The result is a wider operational gap than a single, coherent authentication standard.

Q: What should organisations do if passwordless depends on certificates or PKI?

A: They should govern certificates like any other high-value credential. That means explicit issuance, renewal, revocation, and recovery controls, plus clear ownership for offboarding and exception handling. If certificate lifecycle is weak, passwordless simply shifts the problem from password hygiene to certificate sprawl.

Technical breakdown

Device-bound passwordless authentication and trust anchors

Passwordless authentication usually shifts trust from a memorised secret to a device, biometric factor, or cryptographic credential. That changes the attack surface, but it does not eliminate it. A stolen phone, compromised keycard, or abused enrolled device can still satisfy the access check if the binding between the user, device, and credential is weak. In practice, the security question becomes whether the trust anchor is genuinely possession-bound and lifecycle-managed, not whether the login has a password field. Practical implication: verify device enrolment, revocation, and recovery paths before treating passwordless as stronger by default.

Practical implication: verify device enrolment, revocation, and recovery paths before treating passwordless as stronger by default.

Biometric authentication risk and privacy controls

Biometrics remove the need to remember a password, but they introduce different governance concerns. A fingerprint or face scan is not a secret in the same way a password is, which means compromise, collection, and retention decisions matter more. If biometric data is handled without clear policy boundaries, the organisation may create both security exposure and privacy concerns at the same time. The control problem is therefore not just authentication strength. It is whether the organisation can limit collection, bind biometrics to approved devices, and prevent overreach in the authentication stack. Practical implication: treat biometric enrolment and retention as governed identity data, not just as a convenient login method.

Practical implication: treat biometric enrolment and retention as governed identity data, not just as a convenient login method.

PKI-based passwordless authentication and certificate lifecycle

The article points to PKI-based authentication as a way to strengthen passwordless deployment. In operational terms, that means the access decision depends on trusted certificates, signing, and secure issuance rather than a shared password. The hidden dependency is lifecycle governance. Certificates and related credentials still need issuance, renewal, revocation, and recovery discipline, or the organisation simply replaces password sprawl with certificate sprawl. Passwordless only improves security when those non-human identity controls are managed as rigorously as the authentication experience itself. Practical implication: align certificate issuance and revocation with the same governance standards you expect for any high-value credential.

Practical implication: align certificate issuance and revocation with the same governance standards you expect for any high-value credential.

Breaches seen in the wild

• Cisco DevHub NHI breach — IntelBroker exploited exposed Cisco credentials, API tokens and keys in DevHub.
• Azure Key Vault privilege escalation exposure — Azure Key Vault Contributor role misconfiguration enabled privilege escalation.

Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

Passwordless authentication does not remove identity risk, it relocates it. The article correctly frames passwords as a weak link, but the deeper governance lesson is that authentication risk does not vanish when the secret disappears. It shifts to device trust, biometric handling, recovery processes, and lifecycle discipline. Practitioners should read passwordless as an identity architecture change, not a security end state.

Partial deployment creates a mixed trust model that is harder to govern than either state alone. The article notes that incomplete rollout leaves gaps, and that is the core operational issue. When some applications still depend on passwords while others use passwordless methods, policy, support, and assurance become inconsistent across the same identity population. Practitioners should treat partial adoption as a transition state that increases governance complexity.

PKI-based passwordless only works when credential lifecycle is explicit. Certificates, device bindings, and recovery tokens are all credentials with their own issuance and revocation requirements. If those controls are not managed end to end, passwordless simply moves the burden from password hygiene to certificate hygiene. Practitioners should align passwordless programmes with formal credential lifecycle governance, not just login experience design.

Non-secure IAM remains the real failure mode behind every authentication method. The article is right that weak IAM practices can undermine passwordless security. The broader point is that authentication strength cannot compensate for poor access governance, loose privilege assignment, or unmanaged recovery paths. Practitioners should measure passwordless as part of IAM maturity, not as a stand-alone control.

From our research:

• 97% of NHIs carry excessive privileges, increasing unauthorised access and broadening the attack surface, according to the Ultimate Guide to NHIs.
• Only 5.7% of organisations have full visibility into their service accounts, which means many identity teams cannot reliably see where access is concentrated or stale.
• Passwordless programmes should also be evaluated against Top 10 NHI Issues because credential trust, visibility, and lifecycle controls remain connected across human and non-human identity estates.

What this signals

Passwordless does not reduce governance burden, it redistributes it. IAM teams should expect more emphasis on device assurance, certificate lifecycle, and recovery design as password-based controls recede. That shift is especially important where access spans user logins, shared workstations, and privileged workflows.

Identity assurance is increasingly a lifecycle problem, not a login problem. Once authentication moves away from passwords, the quality of enrolment, revocation, and fallback handling becomes the real determinant of security. Programmes that keep authentication and lifecycle governance separate will struggle to measure whether passwordless is actually reducing risk.

For practitioners

• Map every passwordless trust anchor Inventory whether each flow relies on a device, biometric, certificate, or push approval, then test what happens when that anchor is lost, replaced, or stolen. Ensure revocation and recovery work before rollout reaches production.
• Treat biometric enrolment as governed identity data Define retention, collection, and device-binding rules for biometric factors, and align them with privacy, legal, and IAM policy. Limit where biometric data can be stored and who can trigger re-enrolment.
• Close partial-rollout gaps before expanding passwordless Require consistent enforcement across the full application set, including legacy apps, privileged access paths, and fallback authentication flows. Mixed-mode access should be time-boxed and reviewed as a transition risk.
• Tie certificate lifecycle to access governance If passwordless uses PKI, set explicit issuance, renewal, revocation, and recovery controls for certificates and related credentials. Make ownership and offboarding visible in the same access review process used for other identities.

Key takeaways

• Passwordless authentication can improve security, but only if device trust, recovery, and lifecycle controls are governed as tightly as the login experience.
• The main risk is not the absence of a password, but the presence of weak fallback paths, unmanaged devices, and incomplete rollout.
• Teams should evaluate passwordless as part of identity governance maturity, not as a standalone authentication upgrade.

Key terms

• Passwordless Authentication: An authentication method that removes the password and uses a device, certificate, biometric factor, or other trusted proof instead. The security value comes from how well the replacement factor is bound, enrolled, recovered, and revoked, not from the absence of a password alone.
• Trust Anchor: The control that the system relies on to decide that an identity is genuine. In passwordless environments, the trust anchor may be a device, certificate, or biometric binding, and it must be lifecycle-managed because compromise or loss of that anchor can defeat the access model.
• Certificate Lifecycle: The governed process for issuing, renewing, rotating, revoking, and recovering certificates used for authentication. In passwordless programmes, certificate lifecycle is part of identity security, because weak issuance or revocation can leave access valid long after it should have been removed.

Deepen your knowledge

Passwordless authentication, device trust, and certificate lifecycle are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are designing a passwordless rollout or reviewing a mixed-authentication estate, it is worth exploring.

This post draws on content published by Axiad: Is Passwordless Authentication Safe? Read the original.