3D Secure is an additional security protocol used by RapidCents to authenticate online transactions. It ensures that only the legitimate cardholder can complete the payment by requiring an extra verification step, such as entering a one-time password (OTP) or a PIN. Merchants can enable this feature via the RapidCents Dashboard to enhance payment security.

Common names for 3D Secure include Verified by Visa, Mastercard SecureCode, and American Express SafeKey.