The baffling brain teaser, shared on Instagram’s Threads, asks people to ‘crack the password’ of a lock using a few hints. How quickly can you unlock it?

GREENSBORO, N.C. — How safe is your password? How long would it take a computer to crack it and get all your information? Check out this graphic from Statista. It shows the number of characters ...

Imagine a number lock with a three-digit code, and you're given five clues to crack it open. First, one digit is in the correct spot. Second, one digit is right, but it's in the wrong place.

It's not clear if the GrayKey can reach the fastest unlocking times outlined by Green, but even at slower unlocking speeds, it only takes days to get into an iPhone with a 6-digit passcode.

Having an unlocked iPhone–without so much as a four-digit barrier between you and some subway snatcher–is asking for trouble. Four-digit passcodes or PINs were the only way to secure the ...