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Security
Fraud cases where scammers pose as bank staff or other institution employees to obtain citizens' banking information have increased significantly recently. Interestingly, the new fraud trend closely mirrors the steps of a genuine banking procedure.
Credit Card
A mandatory alphanumeric field, 1-16 characters, sent in tag 50 of EMV transactions, representing a name related to the card application's AID in the ADF.
Payment Systems
A Half 3D Secure transaction is, in short, the term used when the merchant supports 3D Secure but the card does not. Can such transactions occur as 3D Secure/Half Secure when the merchant does not support 3D Secure? A transaction started without the 3D process is treated as Non-Secure.
Merchant & POS
E-Commerce can briefly be described as the sale and purchase of products over the internet, a term used since 1969. Virtual POS operates behind e-commerce transactions, which take place at different levels: Non 3D, Half 3D, and Full 3D Secure.
HSM & Security
TAK stands for Terminal Authentication Key. It is the data encryption key used to generate and verify a Message Authentication Code (MAC) for data communication between a terminal and the acquirer within a local network.
Payment Institutions & E-Money
Law No. 6493 on Payment and Securities Settlement Systems, Payment Services and Electronic Money Institutions defines a payment instrument as a personalized device such as a card, mobile phone, or password.
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.
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…
Payment Systems
In payment systems, an “appeal” is the process of objecting to the outcome of a transaction dispute. It is usually discussed alongside chargebacks, but it plays a critical role in interbank dispute resolution, when a party asks the card scheme to re-evaluate a concluded decision.
Payment Systems
Digitalization keeps changing the speed and shape of payments. AI-based payment agents pay on their own within user-defined limits and rules, completing transactions without the user initiating any action. This post explains how they work and what to watch for.
General
Who will win in Agentic Commerce? Owning the customer used to be a huge advantage. Once an agent starts deciding on the customer's behalf, where does the real power move to?
ISO 8583
F64 — Message Authentication Code (MAC): verifies the origin and text of the message between the sender and the receiver.