Almost one in 10 people use the same four-digit PIN

29 million people have been analysed  from Have I been pwned ? - an Australian-run site that helps people all over the world find out if they’ve been affected by data breaches, El.kz cites abc.net.au.

The most commonly used PINs turned out to be staggeringly popular, meaning they’re particularly easy to guess when phones and bank cards fall into the wrong hands.

This grid of green squares might remind you of an old Space Invaders game, but it’s actually something like a mind-reader.

It’s going to let us peer inside and find out why humans choose some PINs more than others.

Every square in the grid represents a four-digit code.

We’ve highlighted 4560 as an example to get you across how it works.

The grid is arranged by splitting the digits of each code into pairs.

The first two digits (45) are taken from the vertical axis, and the last two digits (60) are from the horizontal one.

The brighter the square, the more popular the code – which means the blocks of bright squares are the ones we need to avoid when choosing a PIN.

1234 is the most popular choice by a huge margin, accounting for nearly one in 10 of the millions of PINs we looked at.

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