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Payment Systems
This Guide links business models frequently encountered in the payments field to the payment services listed in Law No. 6493 on Payment and Securities Settlement Systems, Payment Services and Electronic Money Institutions, and aims at uniformity in practice.
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.
E-commerce
In recent years, data exchange over wireless mobile devices has become much faster and more secure. In 2019, mobile devices were used in 54.5 percent of purchases made by e-commerce users. With the steady growth in mobile users, mobile commerce keeps gaining ground.
Credit Card
Payment systems are changing fast, and new players are emerging. The Advantage Card, the first installment credit card in Turkey and Europe, did not come from a bank, which holds lessons for today's fintech entrepreneurs.
Merchant & POS
Onboarding refers to all the practices that help a customer learn to use a product or service for the first time. In payment institutions, it covers verifying a customer's information and documents during merchant application.
ISO 8583
DE 9, Conversion Rate, Settlement, carries the settlement conversion rate. It is an 8-digit numeric value: the first digit shows the decimal position from the right and the next 7 digits show the value.
Credit Card
A real attempted card fraud story: a fake Facebook friend request, a promise of free bank points, and a request for card number, expiry date and CVV2. Here is what happened and how to protect yourself.
Credit Card
First, let's cover what the security code is: a 3-digit numeric value generated during card printing and printed on the card to verify the cardholder and reduce fraud risk. This value is called CVV2/CVC2.
ISO 8583
F37-RETRIEVAL REFERENCE NUMBER is a code generated by the bank that initiates a transaction, used to uniquely track it. It is a 12-character alphanumeric value.
ISO 8583
F39 - RESPONSE CODE: This is the code showing whether the transaction was approved or declined. It is 2-digit alphanumeric. Typically 00 is sent when approved, and a decline reason code is sent when declined.
Merchant & POS
It's important to first distinguish between magnetic-stripe and fallback transactions. A magnetic-stripe transaction skips the chip entirely, which lowers its security level compared to a fallback transaction.
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.