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Online & Authorization
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.
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
KKB was established, under banking law, to enable the exchange of all kinds of information and documents among at least five banks, and it also shares credit information about customers. The Credit Bureau of Turkey also serves deposit banks, participation banks, financial institutions, and more.
Agentic Commerce
The next customer on the internet may not be human. If AI agents become part of purchasing decisions, the rules of e-commerce, marketing, and payment systems could change.
E-commerce
AI agents are moving beyond answering questions to searching, deciding, and paying on behalf of users. This post explains Agentic Commerce and what it means for payment systems, digital wallets, e-money institutions, banks, and fintechs.
ISO 8583
F34 — Primary Account Number, Extended: this field is filled when the card number cannot be placed in F2 because it is longer than 19 digits or contains special characters.
HSM & Security
RSA, first used by Rivest, Shamir and Adleman, is a security algorithm used in digital cryptography. RSA differs from older symmetric algorithms because it enables digital signing and advanced encryption for e-commerce systems and high-profile institutions.
Payment Systems
The BRSA has published a draft amendment to the regulation on remote identification methods used by banks and electronic contract relationships. It extends remote onboarding to legal entities, including MERSIS-based verification of representatives.
Merchant & POS
The Regulation on the Non-Use of Crypto Assets in Payments, published in the Official Gazette on 16 April and effective from 30 April, looks set to seriously affect cryptocurrency developments in Turkey. Here are its key points and the full text.