A LITTLE-known four-digit code on supermarket shelves could help shoppers save cash on their weekly shop by showing exactly ...

Three is urging its mobile customers to dial a four-digit code if they receive a suspicious text offering them a 'large ...

California this month became the first state to require credit card companies to create a unique four-digit code for stores selling firearms. And on the same day the law took effect in California, ...

Password health is important, but don’t overlook the humble PIN, too. Often just four digits, it stands between bad actors and major parts of your life: your bank account, your smartphone, your home ...

Credit card security codes are three-digit codes on the back of your card (four-digits on the front if you have an American Express card) used to verify that have the physical card. You typically ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Getting through airport security is already ...