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GO Secure Payment logo

Merchant & POS

What Is Secure Payment (GO)?

GO Secure Payment is a system developed by BKM that verifies cardholders using a one-time password (OTP) during online purchases made with TROY cards, providing banks with a secure verification platform without needing to store card data.

Diagram illustrating the SPoC solution architecture for secure PIN entry on a COTS device

Security

What is Software-based PIN Entry on COTS (SPoC)?

Published by the PCI SSC, Software-based PIN Entry on COTS (SPoC) is a standard that provides a software-based approach for protecting PIN entry on commercial off-the-shelf devices such as smartphones and tablets.

Illustration of a Zone PIN Key (ZPK) protecting PIN data in a payment network

HSM & Security

What is ZPK (Zone PIN Key)?

ZPK, also known as the PIN Protection Key, is a data encryption key that is distributed automatically and used to encrypt PINs. It is also referred to as the 'Working Key'. This key allows PIN information to be carried securely across the network.

POS terminal used for EMV card payment processing

Merchant & POS

TVR (Terminal Verification Results)

Terminal Verification Results (TVR): a sequence of bits produced when a terminal reads an EMV card, based on logical checks such as an expired card. This data object is used to decide whether a payment transaction should be accepted online, declined, or allowed to proceed.

Online mail order payment form being filled out on a laptop

Merchant & POS

What is the risk of mail order transactions for merchants?

Mail order transactions are preferred by cardholders because they only block the card limit by the installment amount, creating a sales opportunity for merchants. But is the remaining balance guaranteed?

Table of CAVV result codes and what they mean for merchants

Merchant & POS

What is CAVV? What is AAV?

CAVV and AAV are verification codes used in 3D Secure transactions to ensure transaction integrity and security. CAVV is used by Visa, while AAV is used by Mastercard.

Illustration of a payment card used for online shopping

Debit Card

Can You Shop Online with an ATM Card?

When we think of online shopping, we usually picture paying with a credit card. But can customers without a credit card, only an ATM card, shop online? Of course they can — you don't need a credit card to enjoy the convenience of e-commerce.

Diagram illustrating TCR (Transaction Record Component) packets used in payment clearing and settlement files

Payment Systems

What Is TCR (Transaction Record Component)?

TCR stands for Transaction Record Component, the packets that carry transaction information in a clearing system. Transaction types in a clearing file are distinguished by transaction code and usage code values, and this data is sent inside TCR packets.

Diagram illustrating the EMV Tag-Length-Value (TLV) data structure used in card transactions

Online & Authorization

What are EMV Tags?

In EMV, data is stored in Tag-Length-Value (TLV) format, and it is carried between the card, the POS terminal, and the authorization system in this same format. This post lists every EMV Tag, its type, and its description.