---
title: "Discussion on \"Building Secure TOTP Two-Factor Authentication (RFC 6238) in Dart/Flutter\" | Hashnode"
description: "Discussion on \"Building Secure TOTP Two-Factor Authentication (RFC 6238) in Dart/Flutter\". Most \"add 2FA\" tickets turn into a scramble because the algorithm feels like it should be obscure, when really it's a short, well-specified RFC that Google Authenticator, Authy, 1Password, and every o"
url: "https://hashnode.com/posts/building-secure-totp-two-factor-authentication-rfc-6238-in-dart-flutter/6aa4ca8596a04a9cf8c46177"
---

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# [Building Secure TOTP Two-Factor Authentication (RFC 6238) in Dart/Flutter](https://blogs.kasinadhsarma.in/building-secure-totp-two-factor-authentication-rfc-6238-in-dart-flutter?utm_source=hashnode&utm_medium=feed)

Most "add 2FA" tickets turn into a scramble because the algorithm feels like it should be obscure, when really it's a short, well-specified RFC that Google Authenticator, Authy, 1Password, and every o

Sep 12 · 9 min read · blogs.kasinadhsarma.in  
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