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 ...

Our brains are littered with passwords and alphanumeric combinations that span all levels of necessary corporate and personal security – from bank accounts and PINs, to work-related e-mail and network ...

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 ...

It can be very convenient to log into the Wi-Fi network easily via password sharing when visiting a new location or a family or friend's house. Instead of having to dig around for the password or ...