Passkeys Authentication: How It Works & Why It’s Replacing OTPs in Digital Payments

Manual OTP-based authentication has not been a seamless fit for digital payments. It adds an extra step to checkout, can be delayed, and may be entered on the wrong page. For customers, this can make the payment journey slower and more confusing. Payment teams need an authentication approach that is easier to use while reducing OTP-related risks.

That’s what makes passkeys relevant to digital payments. They offer a device-bound way to authenticate card transactions without relying on manual OTP entry in the regular flow. The customer verifies the transaction using a device supported biometric or other channels such as Pin, while the passkey securely signs the authentication request. OTP can still remain available as a fallback when biometric authentication isn’t successful or supported.

For a payment issuer, the question is how a passkey fits into the issuer’s authentication decision, the 3D secure (3DS) journey, and checkout. This is where Wibmo Issuer Passkey differs from a generic implementation.

What Passkeys Mean for Payment Authentication

When a customer enables Passkey for a supported card, Wibmo Issuer Passkey connects the customer’s verified device with the issuer’s authentication flow. During a payment, the issuer ACS asks the customer to confirm the transaction using a supported biometric, such as a fingerprint or Face ID. Once the verification is complete, the ACS authenticates the transaction and the payment can proceed.

The biometric does not travel to the issuer. It unlocks the private key locally, while the issuer receives the result of the cryptographic verification. This FIDO2 and WebAuthn approach removes OTP dependency at the identity layer. In a payment context, its more immediate role is to provide an OTP-less, device-bound way to authenticate a card transaction.

That distinction matters. Wibmo Issuer Passkey. It is designed for issuer-led payment authentication, where the authentication decision remains connected to the issuer ACS and the existing card authentication flow.

Also Read: How AI is Redefining Fraud Prevention in Digital Payments?

How Issuer Passkey Fits the Payment Flow

The journey starts on the merchant’s website or app when the customer checks out and selects a card. The merchant initiates authentication. The payment gateway carries the transaction into the payment ecosystem, and the 3DS or card network carries the flow between the relevant parties. The issuing bank’s ACS is the authentication decision maker. It evaluates the request and determines how the customer is authenticated.

When appropriate, the ACS invokes WebAuthn on the customer’s supported device. The customer confirms with the device specific authentication mechanisms such as biometric or pin. The private key signs the challenge, and the ACS verifies the response with the registered public key. The decision travels back through the payment flow to the merchant. The merchant and gateway carry the payment, the network transports the 3DS flow, and the issuer ACS makes and routes the authentication decision.

The ACS can use device and browser fingerprinting, and risk-based authentication assessment as supporting signals. These can help an issuer decide when to offer passkey authentication, apply additional enrolment controls, or use a fallback. The regular passkey journey avoids manual OTP entry, while OTP can remain available when the biometric step is unsuccessful or the device and browser do not support the required flow.

The framework is network-agnostic. It is not tied to one card network’s brand or a single payment route. Its practical coverage still needs to be understood accurately. Issuer Passkey is primarily for web-based browser ACS flows and depends on operating-system support such as Keychain or CredentialManager and support in the latest browsers. It does not operate over embedded web-views or iframes.

Why Wibmo’s Issuer ACS Advantage Matters

A generic passkey service usually focuses on authenticating a user to an app or website. Wibmo’s Issuer Passkey brings FIDO2-compliant, device-based security into the issuer ACS context. The ACS can determine whether a transaction should use passkey authentication, invoke the device WebAuthn flow, verify the signed response, and retain OTP as a fallback where the payment policy calls for it. That issuer control is the key difference in an ACS-led landscape.

The model supports the payment ecosystem rather than asking the merchant to own biometric authentication. It can work across iOS, Android, and supported WebAuthn browsers, while the issuer retains the ACS decision point. Wibmo describes it as FIDO2 certified, PSD2 SCA ready, and RBI AFA compliant. The private key remains device-bound and biometric data stays on the device.

Related Read: Payment Gateway: Definition, How It Works & Key Features

The Value for Customers, Operations, and the Business

The customer benefit is most visible at checkout. The reference material indicates that authentication can be completed in under 10 seconds. In the regular passkey flow, the customer avoids waiting for a code, switching screens, or manually entering an OTP. Biometric confirmation and a signed challenge can reduce redirection friction. OTP remains a fallback where biometric authentication is unsuccessful or unsupported.

For payment performance, the reference deck cites an approximately 1.5% improvement in authentication success rates. A smoother step can help more legitimate transactions complete. The result depends on rollout, adoption, device coverage, and risk policy, so it is not guaranteed for every deployment.

The deck also cites a 50%+ reduction in OTP-driven support tickets. Fewer OTP-related issues can reduce support effort around delayed codes, failed entry, and customer confusion, while the fallback remains available for exceptions.

The security value comes from the credential design. A private key stays on the customer device, and biometric data stays there as well. The origin-bound WebAuthn interaction is phishing-resistant, and the regular passkey flow avoids the OTP compromise exposure that exists when a one-time code must be sent and manually entered. This is a stronger protection model, not an absolute promise that every form of fraud disappears. By helping authenticate the genuine customer with a device-bound credential, Issuer Passkey can also support efforts to reduce dispute and chargeback costs. That is a business benefit to work toward, not a guaranteed outcome.

Passkeys are becoming more relevant to payments because they address OTP friction, phishing exposure, and repeated code-based authentication. Wibmo’s advantage is its payment focus. It places FIDO2 and WebAuthn where the issuer makes the authentication decision, while keeping the framework network-agnostic and clear about browser scope. A practical rollout starts with supported devices and browsers, enrollment controls, risk policy, and a fallback for incomplete passkey journeys.