If you use a four-digit PIN number, your personal code may not be as secure as you think. PIN codes are commonly used to unlock iPhone or Android devices, access online banking, get cash out of an ATM ...

Forbes contributors publish independent expert analyses and insights. Davey Winder is a veteran cybersecurity writer, hacker and analyst. Keeping your iPhone or Android device secure is a no-brainer.

Are you tired of others accessing your Netflix profile and messing up your recommendations or altering your watchlist? Or maybe you want to ensure your kids can't watch mature content? If so, using a ...