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.

Forbes contributors publish independent expert analyses and insights. Davey Winder is a veteran cybersecurity writer, hacker and analyst. Update, May 20, 2025: This story, originally published May 19, ...

If you have an Apple or an Android phone—and you probably do—you have the option of locking your phone using a PIN code. With most of these phones, you can choose a four-digit PIN or a six-digit PIN.

The credit and debit-card security breach at Target (TGT) has grown into an even bigger headache for customers with the retailer's admission that encrypted personal identification numbers were stolen.

What's safer? Using a numeric PIN code to unlock your Android smartphone or relying on a finger squiggle? Newly-released research suggests that, at least when someone close by could be looking over ...

Letters have been the most ancient mode of communication for major parts of India, Egypt, Sumer, Rome, Greece and China. But have you ever thought how these confession papers reach the right location ...

You’ve likely seen a list of top 25 passwords that get reused time and time again – “password” is a usual suspect – but what about phone PIN numbers? How ...

Password health is important, but don’t overlook the humble PIN, too. Often just four digits, it stands between bad actors and major parts of your life: your bank account, your smartphone, your home ...

Secure instant messaging app Signal launched this week a new feature called "Signal PINs" which the company says will help users migrate account data between devices. Signal says that in the long run, ...