One-time SMS codes are widely used as the second checkpoint in two-factor authentication (2FA) to sign into everything from banking apps to email accounts. As I've written before, though, SMS is one ...

To join the CNBC Technology Executive Council, go to cnbccouncils.com/tec OTPs via text message, or SMS, are vulnerable to attacks by fraudsters through a variety of ...

It's just not safe.

Many apps today ask for a code after you enter your password. Sometimes this is called OTP, and sometimes Two-Factor ...