Explained: Stateless vs. Stateful (Which 2FA is Better?)

Is your Two-Factor Authentication (2FA) actually secure? 🔐

Most people use Google Authenticator or Authy without realizing there are two very different ways servers validate those 6-digit codes. In this video, we break down the core mechanics of Time-based One-Time Passwords (TOTP) and dive deep into the technical battle: Stateless vs. Stateful Validation.

What you’ll learn:

The math behind the code: How RFC 6238 works.

Stateless Validation: Why it’s the industry standard for scalability.

Stateful Validation: How to prevent "Replay Attacks" and why enterprises use it.

The "Drift Window" – How servers handle out-of-sync clocks.

Which method you should choose for your next project.

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Видео Explained: Stateless vs. Stateful (Which 2FA is Better?) канала Code Bit