New estimates from a security researcher suggest GrayKey, a digital forensics tool in active use by U.S. law enforcement agencies, is capable of cracking Apple's standard six-digit iPhone passcode ...

Apple steps up security with native two-factor and 6-digit passcodes in iOS 9 Apple puts two factors front and center to secure accounts in iOS and OS X, while suggesting a longer passcode in iOS 9.

WhatsApp is launching a new beta version for Android users to use the new security feature; a 6-digit code to log into WhatsApp on different devices.

With a four digit PIN, there are a possible 10,000 combinations. But with a six digit code, there are 1 million possible combos, making it a lot tougher for someone to crack your security code.

Are you having trouble logging into Facebook because it's asking you for a 6-digit code that you can't get? You aren't the only one.