Should banks prioritise passkeys over other identity changes first?

Why Banks Should Not Treat Passkeys as the First and Only Identity Change

For banks, passkeys are best understood as a high-value control shift, not a blanket replacement strategy. They can sharply reduce phishing and credential replay, but the main question is what attack path they actually remove and what risk remains if recovery, device change, or account takeover processes stay weak. If those surrounding controls are unchanged, the bank has moved the attack, not eliminated it.

The practical priority is to target the most common compromise route first. In many banking environments, that means replacing reusable passwords where phishing pressure is high, while also hardening recovery journeys and approval workflows that attackers can abuse after login is stronger. The control only pays off when it reduces fraud opportunity across the full session and account lifecycle. Ultimate Guide to NHIs shows how weak identity hygiene, excessive privilege and poor lifecycle control create durable exposure, which is a useful reminder that stronger authentication alone does not close the broader access problem.

In practice, many banks discover that the weakest link shifts from password theft to recovery abuse, support-channel social engineering, or session hijacking only after the new login method is already deployed.

How Passkeys Work in a Banking Rollout

Passkeys replace shared secrets with cryptographic credential pairs stored on a user device and bound to the relying party. That removes the most common phishing path because the user is not typing a reusable secret into an attacker-controlled site. It also changes the bank’s fraud posture: attackers must now compromise a device, intercept a recovery flow, or manipulate a downstream session rather than simply harvesting credentials.

That shift is valuable, but only if the bank treats passkeys as part of an identity chain rather than a login feature. A sound rollout usually involves:

• Prioritising customer populations with the highest phishing loss or highest password-reset volume.
• Keeping step-up controls for high-risk actions such as payee creation, limit changes, and new-device enrolment.
• Binding authentication to transaction approval where the platform supports it.
• Hardening account recovery so support staff, SMS fallback, or email resets do not become the new bypass.
• Monitoring session quality, device change events, and abnormal enrolment patterns after deployment.

Because passkeys are device-bound, banks also need a clear answer for lost phones, shared household devices, and customers who use multiple channels. The migration breaks down when recovery and support processes still assume password-era trust, because that creates an easier path around the stronger authenticator.

Common Variations and Edge Cases

Tighter authentication often increases recovery friction, so banks have to balance fraud reduction against customer support load and abandonment risk. The right priority depends on whether the dominant problem is phishing, account recovery abuse, or step-up weakness during transactions.

There is no universal standard for sequencing every identity change. In some banks, passkeys should come first because password theft is the clear top exposure. In others, stronger customer authentication will have limited effect unless the bank first fixes session governance, password reset controls, or call-centre verification. A passkey programme also needs special handling for customers who cannot reliably hold a single trusted device, because those flows often force exceptions that adversaries target.

Where fraud losses are concentrated in transaction manipulation rather than login compromise, a transaction-binding design may matter as much as, or more than, the primary authenticator. The same applies when mobile app sessions remain valid too long or when device-binding is weak, since a stolen active session can bypass the benefit of a better login factor.

Practitioner Guidance

What to prioritise: Start with the identity change that removes the most common compromise path for the largest fraud segment, then harden the bypasses that remain. For many banks that means passkeys plus recovery redesign, not passkeys alone.

Decision rule: If phishing or credential replay is driving losses, passkeys deserve early priority. If support-channel fraud, account recovery abuse, or session hijacking is the bigger issue, treat those controls as equal or higher priority and sequence the rollout accordingly.

What to verify: Confirm that enrolment, device replacement, fallback authentication, and high-risk transaction approval all have stronger governance than the login screen itself. A stronger authenticator is only meaningful if an attacker cannot simply route around it.

Practitioner takeaway: The right strategy is to reduce the easiest path to account compromise first, while ensuring the remaining recovery and session paths are at least as hard to abuse as the new authenticator.

Related resources from NHI Mgmt Group

• Should organisations prioritise external exposure or internal credential governance first?
• When should organisations prioritise NHI posture management over other identity work?
• When should organisations prioritise NHI security over other identity work?
• Should organisations prioritise phishing-resistant MFA over other identity projects?