Dave Lieber I was confused. Kept seeing mention of a security “key” offered on some of my favorite websites—Microsoft, Google, YouTube and Facebook, to name a few. I wasn’t sure if I should use it.

There is no doubt we live in a digital world. We pay our bills, exchange correspondence and watch entertainment on our personal computers, mobile phones and other electronics, from tablets to TVs. All ...

Kept seeing mention of a security “key” offered on some of my favorite websites—Microsoft, Google, YouTube and Facebook, to name a few. I wasn’t sure if I should use it. How does it work? Is it a real ...