EMV
What Is Pin Change/Unblock?
The Pin Change/Unblock command is used after card issuance to let the issuer remove a card's PIN block, or instantly change the reference PIN and remove its block, as well.
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"ATM Security"
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ATM
How is PIN verification performed at an ATM?
At payment points such as ATMs and POS terminals, the most critical step is PIN verification or verifying the customer through their identity information. However, since ATMs cannot verify a customer's identity, PIN verification becomes more important. So how is it performed?
Payment Systems
What is BKM (Interbank Card Center)?
BKM, short for Interbank Card Center, is a legal entity established in 1990 with contributions from 13 public and private Turkish banks to provide clearing and settlement for cards.
Merchant & POS
What Is a PIN Pad Device?
A PIN pad lets cardholders safely enter their PIN during POS transactions and lets contactless cards be tapped to transfer card data to the POS. Here is how it works.
Credit Card
What is a prepaid card?
A prepaid card is a customized card, with or without a chip, not linked to a bank account and without a credit limit like credit cards, letting you spend only the amount loaded onto it.
Merchant & POS
What is ISO 8583?
Introduction: When a card (credit card/debit card/prepaid card) is used at an ATM or POS, data must be carried securely between systems. For example, in a store sale, the POS initiates the transaction, which must reach the cardholder's bank intact.
ATM
Is It Possible to Withdraw Cash from ATMs with the New ID Cards?
Chip-based ID cards have made our identities more secure, so they can now be used in many critical transactions. Could they also be used in the world of payments, such as at ATMs?
Payment System Institutions
What are the committees in the BKM system?
BKM (Interbank Card Center) works through several committees: Security, Operations and Technology, Market Development, Business Development, Chargeback Rules and Arbitration, ATM Sharing, plus arbitration committees. This post outlines each one's duties.
ATM
Depositing Money with a QR Code
Many banks now let customers deposit cash by scanning a QR code with their mobile banking app instead of inserting a card at the ATM. This speeds up the transaction, reduces card skimming risk, and adds an extra layer of security through in-app verification.
HSM & Security
What is TPK (Terminal PIN Key)?
TPK stands for Terminal PIN Key. It is a data encryption key used to encrypt PINs for transmission between a terminal and the terminal's bank (acquirer) within a local network. Learn how TPK is used in POS and ATM devices.
Prepaid Cards
What Are the Transaction Limits for Anonymous Prepaid Cards?
Prepaid cards are among the most popular cards right now, and their use keeps growing. A prepaid card is not linked to a bank account, has no credit limit like a credit card, and can be used up to the amount loaded onto it.
Credit Card
What should you know before buying a prepaid card?
A prepaid card is a customized chip or chipless card that is not linked to a bank account and has no credit limit like a credit card. You can only spend up to the amount loaded onto the card.