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Account Information Service Provider concept icon

Payment Systems

What are Account Information Service Providers?

Digital Account Checking underpins many innovative banking and FinTech services. In most cases, it is performed by Account Information Service Providers, which supply data from customers' online bank accounts to other banks and third-party providers.

Diagram illustrating the EMV Tag-Length-Value (TLV) data structure used in card transactions

Online & Authorization

What are EMV Tags?

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.

POS terminal used for EMV card payment processing

Merchant & POS

TVR (Terminal Verification Results)

Terminal Verification Results (TVR): a sequence of bits produced when a terminal reads an EMV card, based on logical checks such as an expired card. This data object is used to decide whether a payment transaction should be accepted online, declined, or allowed to proceed.

Diagram of the EMV application selection flow between the terminal and the card

Merchant & POS

EMV Chip Transaction Processing - What Is Application Selection?

In EMV transactions, Application Selection is the process of choosing among the applications supported by both the card and the terminal. It is the first stage of authorization, so it is very important. This post covers the PSE and List of AIDs methods.

Illustration of Host Card Emulation (HCE) enabling contactless mobile payments

Online & Authorization

What Is HCE?

HCE lets a mobile device's operating system emulate the cards we use daily (credit, debit, gift cards, etc.) to make contactless payments via NFC. In other words, our phones behave like the cards we use for payments.

Conceptual illustration of a brain-computer interface chip connected to a human brain

Payment Systems

What Could Neuralink Change in Payment Systems?

Elon Musk was set to unveil Neuralink, a brain-computer interface. What is Neuralink, and how might payment systems change if payments, cards, ATMs and POS devices move from phones to a chip in the brain?

Fintech companies combining finance and technology

Payment Systems

What is Fintech?

Fintech, short for financial technologies, is a term for companies that bring together finance and technology to provide easy and fast financial services, growing rapidly worldwide.

Diagram of chip card file structure showing MF, DF, and EF layers

EMV

What is Dedicated File Name (DFN)?

DFN is the abbreviation for Dedicated File Name. It defines the name of the DF (Dedicated File) as described in ISO/IEC 7816-4. It is the data found in Tag 84, 5 to 16 characters in length.

PIN pad device connected to a POS terminal

Merchant & POS

What Is a PIN Pad Device?

A PIN pad lets cardholders safely enter their PIN during POS transactions and lets contactless cards be tapped to transfer card data to the POS. Here is how it works.

Online shopping and e-commerce payment on a laptop with a bank card

Payment Institutions & E-Money

What are the advantages of working with a payment institution?

Online shopping keeps growing, and e-commerce sites must choose between working with a bank or a payment institution. This article explains why a single application and integration with a payment institution can be the better route.