What Is a Personal Identification Number? A PIN is a short series of numerals that a card or account holder must use to authenticate their identity in a digital transaction.

A social media creator has questions about the security of the 'bypass PIN' option when swiping a debit card to pay for purchases.

So entering a wrong pin number to see if a card reader is fake won't stop crooks from already gaining access to your credit card number.

If you use a four-digit PIN number, your personal code may not be as secure as you think. PIN codes are commonly used to unlock iPhone or Android devices, access online banking, get cash out of an ...