olemus
MasterCardi autentimisteenus, põhineb protokollil 3-D Secure
= MasterCard authentication service, based on the 3-D Secure protocol

ülevaateid
https://www.bankofirelanduk.com/app/uploads/2017/04/BOIUK_Mastercard_SecureCode_Frequently_Asked_Questions.pdf

https://en.wikipedia.org/wiki/3-D_Secure

https://www.mastercard.us/content/dam/mccom/en-us/documents/SMI_Manual.pdf