personal identification number
Also known as: PIN
Quick Summary
A Personal Identification Number (PIN) is a secret code used for authentication, most commonly with automated teller machines (ATMs) and bankcards. It is a coded identification that must be entered along with a bankcard to confirm the card is being used by an authorized person. The term "PIN number" is redundant because PIN itself stands for Personal Identification Number. PINs are crucial for security in electronic banking and other financial transactions, protecting cardholders from impersonation.12
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