La carte à bande magnétique est un type de carte qui utilise des champs magnétiques pour stocker des données et est largement utilisé dans une variété de scénarios de paiement et d’identification. Voici une explication détaillée des cartes à bande magnétique :

Définition et utilisation :
Magnetic stripe cards are a common card technology that is mainly used to store and transfer data. In most cases, when the term "magnetic stripe card" is used, it usually refers to ISO-standard financial exchange cards such as bank cards, credit cards, debit cards, etc.

Structure et voie :
The magnetic strip is usually composed of three tracks, namely track 1, track 2 and track 3.
Track 1: Main memory card account number, card issuing line code and other information. Its data format is variable length, typically 79 characters.
Track 2: Main memory card main account number, cardholder name, expiration date and other important information. Its data format is also variable in length, typically 40 characters.
Track 3: Generally not used to store important payment information, additional information can be stored as needed.