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 ...

We've probably all received confirmation codes sent via text message when trying to sign into an account. Those codes are supposed to serve as two-factor authentication to confirm our identity and ...

I have long encouraged the use of two-factor authentication (2FA) or two-step verification (2SV) with online accounts whenever possible (for more about the difference, see “Two-Factor Authentication, ...

This added security layer can be annoying but it can also protect you from hackers with only a few seconds of your time This article explains two-factor authentication and how to get verification apps ...

WhatsApp now allows businesses to send authentication and login codes through its API to users in India. The company confirmed that it enabled this functionality in India starting July 1. Meta ...

Update, Feb. 26, 2025: This story, originally published Feb. 23, now includes additional commentary regarding the potential security implications of the decision to deprecate SMS from the Gmail ...