What is a Time-based One-time Password (TOTP)?

TOTP (Time-based One-time Password) is a common form of two-factor authentication. Unique passwords are generated using the current time as an input.

I implemented the Time-Based One Time Password (TOTP) algorithm on my phone, I think 2FA is such a cool concept. : r/compsci

How Atlassian implemented its own multi-factor authentication library with time-based one-time passwords MFA with TOTP library - Atlassian Engineering

How to Set Up Time-Based One-Time Password (TOTP) with VoIP.ms

TOTP Time Based One Time Password Algorithm RFC 6238 2FA

The One-time Password (OTP) Ultimate Guide

What is a Time-Based One-Time Password (TOTP)?

How Time-based One-time Password (TOTP) algorithm works

Implement 2FA Login and TOTP Via Authenticator Apps

TOTP vs SMS: Which one is better for two-factor authentication (2FA)? - Stytch