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 earliest ...

The iPhone offers strong end-to-end encryption for all your data, and that's a great feature to have on the most important computer in your life. But that encryption is only as good as the PIN or ...

In the age of mobile computing, security is more important than ever. Protecting your data from those who could use it to cause you harm is a never-ending battle. While an alphanumeric password is ...

Conventional wisdom (and some oft-cited research) says that humans can keep only about seven numbers in their head at a time, which makes remembering a 14-character alphanumeric password nearly ...