What is 3D Secure authentication?

3D Secure is an online payment authentication protocol designed to reduce unauthorised card transactions by requiring customers to verify their identity through coordination among card issuers, merchant banks, and payment platforms. The original 3DS1, introduced in the late 1990s, relied on static passwords or one-time codes and often created checkout friction, while the newer 3DS2 improves security and usability through greater data sharing, mobile optimisation, biometric options, and more frictionless low-risk transactions. By adding verification steps such as app approvals, one-time passwords, or facial recognition, 3D Secure can limit fraud, reduce chargebacks, shift certain fraud liability from merchants to issuers, support regulatory compliance such as PSD2, and strengthen customer trust. However, delayed authentication messages, false declines, technical integration challenges, and continuing maintenance can affect conversion and operations. Businesses can use AI- and machine-learning-based risk analysis and tailored rules based on factors such as transaction amount, frequency, location, behaviour, and historical patterns to reserve stronger checks for high-risk purchases. Airwallex promotes its 3DS2 and risk-engine capabilities as a way for merchants to balance payment acceptance, regulatory requirements, fraud prevention, and checkout convenience.

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