Ransom notes for Savannah Guthrie's mom demanded millions in Bitcoin. Here's why criminals like it.

Spoiler alert: No whiskey stones or beard oil appear on this list.

Biometric locks like face recognition are easy to set up—but thanks to a legal loophole, they're easier for law enforcement to bypass than a passcode.

A Mesa senior lost thousands of dollars to a scammer, but Arizona's new cryptocurrency fraud prevention law is helping her ...