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Laws & Regulations
The Visa Core Rules and Visa Product and Service Rules documents define the fundamental rules that apply to all institutions in the Visa network. They are updated regularly, and all members are expected to follow the latest version.
EMV
The Pin Change/Unblock command is used after card issuance to let the issuer remove a card's PIN block, or instantly change the reference PIN and remove its block, as well.
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.
Credit Card
The effect of credit cards on inflation has been debated for years. Because I am asked about it so often, I ran a poll on arifunal.com to gather readers' views. This post weighs the positive and negative effects and compares the poll with the research findings.
Credit Card
ISO/IEC 7816 is an international standard jointly maintained by ISO and IEC, covering contact-based electronic identification cards, especially smart cards. It consists of 15 different parts, each covering a different aspect of smart card technology.
Credit Card
CVV is short for Card Verification Value, a term used by Visa. CVC is short for Card Verification Code, a term used by MasterCard. The CVV/CVC code is used for cardholder verification and to reduce fraud risk.
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…
Merchant & POS
Payment systems once meant a physical card and a PIN on a POS device. Digitalization that began with contactless transactions has accelerated with mobile payments, and MasterCard is now working on voice shopping and Soft POS in Turkey.
EMV
The Application Unblock command removes the block placed on an application by the Application Block command, making the application usable again. Like Application Block, it is a command sequence managed after the card is presented to the terminal.
Merchant & POS
Mail order transactions are preferred by cardholders because they only block the card limit by the installment amount, creating a sales opportunity for merchants. But is the remaining balance guaranteed?
Debit Card
We previously explained detailed information about Mifare cards at the link below: https://unalarif.com/yazi/mifare-kart-nedir/ Now let's list the technical features of Mifare cards.
HSM & Security
HSM, short for Hardware Security Module, is specialized security hardware built to store sensitive cryptographic keys in a physical environment and to perform cryptographic operations in the most secure way.