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EMV
EMV standards form the foundation for chip cards to work on terminals worldwide, but each scheme - VSDC (Visa), M/Chip (Mastercard), AEIPS (Amex), J Smart (JCB), D-PAS (Discover), and UICS (UnionPay) - defines its own keys, rules, and card profiles.
Credit Card
It is a CVV2/CVC2 code that changes every few minutes instead of the static code printed on the back of a credit card, aimed at reducing fraud risk in CNP (Card Not Present) transactions.
Merchant & POS
An operation that allows a credit card's limit to be blocked for a period, due to the nature of the product or service sold. Preferred mainly by companies in travel, tourism, and car rental.
Merchant & POS
Pre-authorization closing turns a pre-authorized transaction into a financial one, posting it to the merchant and cardholder accounts. See how amounts and available limit are affected.
Merchant & POS
AUC (Application Usage Control) specifies restrictions that limit an application by geography or by specific transaction types. It is a 2-byte data element in Tag 9F07. If present, the terminal performs checks such as whether the transaction is at an ATM.
HSM & Security
Secure Element Issuer is the stakeholder that provides, maintains, and updates the secure element in cases where mobile payment application and card data are stored in the secure element inside a mobile phone.
Merchant & POS
In order for a bank's POS devices to process transactions with payment scheme cards (Visa, MasterCard, Troy, etc.), they must pass certain test and control steps. Visa and MasterCard have test tools that include test cards and test scenarios for this purpose…
ISO 8583
F14 - DATE, EXPIRATION DATE: the expiration date printed on the card by the issuing bank, a 4-digit numeric value in YYMM format. See how it's checked and why the YYMM order matters.
Payment Systems
Online PIN is verified by the card-issuing institution through the message itself, while Offline PIN is verified on the chip. This article explains the difference and when PIN bypass is allowed.
Credit Card
While it is true that, with technological advancement, the trend of using payment transactions without a physical card via mobile phones has increased, there are many reasons why cards are still physically printed and delivered to customers.
Merchant & POS
In EMV transactions, Application Selection is the process of choosing among the applications supported by both the card and the terminal. It is the first stage of authorization, so it is very important. This post covers the PSE and List of AIDs methods.
Credit Card
The Application Interchange Profile indicates the application functions supported by the card. The AIP values and their descriptions are given below. Where is the AIP found? The AIP is a 2-byte piece of data stored on the card, carried under EMV tag 82.