Add Yahoo as a preferred source to see more of our stories on Google. What's a verification code, and why are they so important? Six-digit verification codes are a form of two-factor authentication, a ...

The IRS is encouraging taxpayers to get an identity protection PIN (IP PIN). An IP PIN is a six-digit number that helps prevent thieves from filing federal tax returns in your name. With worries about ...

WhatsApp is testing a new SIM-based verification system for Indian users to comply with government rules requiring accounts to remain linked to active mobile numbers.

What's a verification code, and why are they so important? Six-digit verification codes are a form of two-factor authentication, a process that helps keep your important online accounts secure. For ...