Information is Beautiful shared their visualization analyzing 3.4 million PIN codes from data breaches, originally created by data analyst Nick Berry . The post warns users that common weak PIN patterns like "1234" and "1111" are heavily exposed in breach data and easily guessable. This matters because roughly 11% of exposed PIN codes use "1234" — if you're using a predictable PIN on bank accounts, credit cards, or hotel safes, changing it reduces risk from account compromise.