The downside is that Authenticators are still somewhat unconventional for the average computer user, and the process of using them isn't exactly obvious. Other 2FA mechanisms like SMS and phone callbacks require you to use a paid for service to initiate the request, or yet another piece of private information you have to hand over in the case of a second email address or SMS phone number.
1PASSWORD APP FREE
I prefer Authenticator apps because - outside of the free Authenticator app requirement - they are a fully self-contained solution: you don't need an external service to verify a validation. This post is specific to 2FA with an Authenticator app, but there are other ways to implement 2FA including a second email address, SMS messages or phone callbacks. I'll describe my integration in my own Web Store, so it's somewhat app specific, but the examples I provide are generic enough that you can easily modify them to fit into your particular application scenario.įor reference, here is the implementation I'm going to be discussing:įigure 1 - The entire workflow of two Factor Authentication with an Authenticator App (1Password) Two-Factor Authenticators
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In this post I'll describe how to to implement Authenticator based verification outside of the context of ASP.NET Identity, so you can add this to just about any solution. As such you still need a primary authentication provider to verify the user first, and you can use 2FA to provide additional security or provide a way to recover an account in case the passwords is lost. Two Factor Authentication is an additional bit of security that you can use on top of an existing authentication system to provide extra security, that can't be easily discovered or stolen as it uses one-time keys. Unlike using Email or SMS for the second piece of validation in 2FA, Authenticator apps don't require you give up another piece of private information or use an external service to verify an existing account.
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Authenticator based Two Factor Authentication (2FA) using an external app like Authy, Google or Microsoft Authenticator or one of the Two Factor Authentication (2FA) enabled password managers like 1Password are becoming more common in Web applications.
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