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"cardholder security"

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Illustration of a card present transaction being processed at a POS terminal

Security

What is a CP (Card Present) Transaction?

A CP transaction refers to a card transaction in which the card and cardholder are physically present at the location. Card Present transactions occur when the card's magnetic stripe or chip data is read by a POS terminal or ATM, or via contactless.

Diagram of ISO 8583 Field 2 (F2) card number structure

ISO 8583

ISO 8583 Field Descriptions (F2)

F2 is the Card Number field in ISO 8583, identifying the cardholder and issuing bank. This post covers its structure, the 8-digit BIN update, field format, first-digit scheme identification, and PCI DSS security requirements.

ISO 8583 F124 field structure and subfield breakdown

ISO 8583

ISO 8583 Field Descriptions (F124)

F124 (Private Additional Data) contains additional information specific to the transaction, such as Card Update Failure Code and Status, cardholder name in money transfers, and keys in network management messages.