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 ...

Forbes contributors publish independent expert analyses and insights. Davey Winder is a veteran cybersecurity writer, hacker and analyst. Update, Jan. 25, 2025: This story, originally published Jan.

Online verification has become a big part of how we stay safe and private on the web. Every app, website, or service now wants to confirm you’re real. But giving out your personal number can be risky.