text messages

What to do if you receive a text with a two-factor authentication code from a service you’ve never registered for.

One-time codes and two-factor authentication securely protect you from account theft. If you receive such a code or a request to enter it when you aren’t logging in, it may be an attempt to hack into your account.

What multi-factor authentication is, why you should use it, and what “factors” there are.

A bug in the iPhone means that users shouldn’t necessarily trust that text messages they receive are coming from the phone numbers they claim to be sent from. According to