A Personal Identification Number (PIN) is a unique numeric code used to authenticate a user’s identity, typically in electronic transactions. It is commonly required for accessing bank accounts, ATMs, and mobile payment systems. A PIN usually consists of four to six digits and should be kept confidential to prevent unauthorized access.
When a user enters their PIN, it is compared to the stored code associated with their account. If the numbers match, access is granted. Using a PIN enhances security by adding an extra layer of protection beyond just a username or account number, making it harder for unauthorized individuals to gain access.