A million two-factor authentication codes sent via SMS passed through an obscure third-party company. Here's how it happened and why it's a problem.

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 ...

This security feature might not be so secure after all. Apple and Android users have been urged to stop receiving two-factor authentication codes via text after government officials revealed a ...