A study has revealed that the world's most popular four-digit ATM PIN combinations, like 1234, are the most dangerous combinations and can be guessed easily.
The Huffington Post reports that there are 10,000 different possible four-digit ATM PINs, but almost 11% of PINs are the most easiest to crack.
A study by Data Genetics has discovered the most dangerous PIN numbers by analyzing 3.4 million passwords.
The top 10 most commonly used PINs found out by the study are 1234, 1111, 0000, 1212, 7777, 1004, 2000, 4444, 2222, 6969.
The top 10 most common passwords make up over 20% of all of the passwords found, the report added.
Meanwhile, 26.83% of all passwords could be guessed by attempting the top 20 most popular combinations.
The study also revealed that four digit numbers starting with 19, for 19th century, are also bad passwords.