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.

I have all but moved on from password to passkeys, where possible, as a safer alternative to typing a long string of characters. But there's a caveat: if someone gains physical access to your computer ...

Privacy and security concerns are becoming more commonplace as data sharing becomes more commonplace. Here's how to lock down your computer via USB key.