How to Implement & Optimize 3D-Secure: Webinar Q&A

The webinar on implementing and optimizing 3D-Secure addressed various questions about the technology, focusing on its application for payment and authentication processes. It clarified that each card network, like Visa and Mastercard, operates its directory server, which communicates with the issuing bank's Access Control Server during the 3DS flow. The discussion highlighted that Non-payment Authentications allow card additions without payments, while 3DS is necessary for payment authorizations to benefit from liability shifts. Recurring payments can use Merchant-Initiated Transactions for backend authentication, and the system can fallback to direct authorization if 3DS servers fail. In terms of infrastructure, businesses typically rely on 3DS Server vendors, and Evervault supports both backend and frontend integration for Customer-Initiated Transactions, requiring frontend for browser details collection. The 3DS process often involves merchants initiating authentication, particularly in 3DS-Requestor Initiated scenarios, with fingerprinting skipped for non-present cardholders. Technical limitations may affect acquirers' acceptance of external authentications, but payment service providers like Stitch can facilitate this. Evervault's standalone 3D-Secure Server offers a flexible solution for merchants to authenticate payments, shift liability, and meet regulatory requirements.

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