What Is OTP in Authentication? A Comprehensive Guide One-time password (OTP) is a powerful security tool used to verify user identity during authentication. In this comprehensive guide, we explore what a one time password is, how it works, and why it’s widely used in login and transaction verification. OTPs are temporary codes that add an extra layer of security, helping prevent unauthorized access. Whether sent via SMS, email, or an app, a one time password ensures secure, time-sensitive user verification in today's digital world. More Info - https://www.loginradius.com/blog/identity/what-is-one-time-password