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Merchant & POS
This can occur at companies selling products from different sectors. For example, you enter a shopping mall and buy a refrigerator for 3000 TL, a dishwasher for 2000 TL, and an iron for 1000 TL, each under a different installment campaign.
Online & Authorization
Pay by link is an innovative financial solution that completes a payment through a link sent over the internet, making it possible to shop and transfer money through channels like WhatsApp and Instagram.
HSM & Security
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.
ISO 8583
F61 - POINT OF SERVICE (POS) DATA: This field provides information about the specific status of the POS at the time of the transaction. Position Usage Attribute 1 POS Terminal Attendance Indicator 0 = Attended terminal (Valid for MasterCard debit card and Maestro transactions only).
ISO 8583
DE 52 — Personal Identification Number (PIN) Data: the field that holds the PIN data. PIN verification is carried out based on this field.
Payment Systems
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.
Credit Card
Technology continues to make our lives easier and more secure. Old ID cards were just laminated paper; new ones became personalized and secure with biometric photos added alongside chip data.
Online & Authorization
A reference guide to authorization response codes seen on POS and ATM transactions, with plain-language explanations of what each code means and what to do about it.
Security
Before 3D Secure 2.0, let's explain what 3D Secure is. 3D Secure is a two-layer payment authentication system that protects both the cardholder and the merchant in online payments. First released by Visa in 1999, it was later adopted by other card schemes…
Security
Payment security is very important in payment systems. To increase security, transactions require additional information such as PINs and passwords. Remembering which information to use, and keeping it in mind without forgetting…
Credit Card
Most of us are familiar with CVV2/CVC2 - the security code on the back of a card, usually three digits. So what is dCVV2? Here's how dynamic CVV technology works and why Visa introduced it for online payments.
Security
Access Security Control (ACS) is the security protocol that the card-issuing bank must maintain under the 3-D Secure protocol to support cardholder authentication. 3-D Secure is an XML-based protocol that adds an extra security layer to online card payments.