How to design 2FA: Comparing methods, user flows, and recovery strategies

**How to design 2FA: Comparing methods, user flows, and recovery strategies**

2FA or two-factor authentication is a specific type of multi-factor authentication. As the name suggests, 2FA requires two distinct forms of user verification factors to access a specific protected, registered user-only software system. In the past, software teams used only a one-factor authentication strategy with users’ passwords, but nowadays, with growing security concerns and user authentication evolution, every digital product uses 2FA with password-based authentication, starting from simple SMS OTPs (One Time Tokens) to futuristic AI-powered adaptive 2FA methods and high-security hardware keys. Choosing a suitable 2FA method and implementing a painless user flow for it is mandatory for software security and overall product UX, so let’s learn how to do so in this article. Editor’s note: This article has been significantly expanded and updated to reflect the evolution of two-factor authentication (2FA) over the past decade by LogRocket author Shalitha Suranga...

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