EMV 3-D Secure (3DS) - Payment Authentication Protocol V.12: V.12 Challenge entry boxes, autofill and masking

For the native text or OTP template (ACS UI Type 01) the ACS may configure one or two entry boxes (Challenge Entry Box and Challenge Entry Box 2), each with a required label of up to 45 characters and optional settings: keyboard type (01 numeric, 02 alphanumeric), maximum length 01 to 45 (45 when absent), masking (Y or N) with a show-and-hide toggle required when masking is Y, and autofill: with the autofill flag set to Y the SDK and operating system copy a received or saved code or password into the field, and the autofill type (01 SMS OTP, 02 password, tied to the Android and iOS autofill hints) is then required. Without the flag autofill stays off. The ACS includes only UI elements that fit the chosen UI type; line breaks and bold text in the information texts use the notation Table A.1 sets, and issuer and payment system images are PNG or JPEG.