Security
Apr 03, 2026·11 min read
Implementing Two-Factor Authentication (2FA) in .NET with TOTP and QR Codes
Learn how to implement Two-Factor Authentication (2FA) in .NET using TOTP, QR codes, and ASP.NET Core Minimal APIs. Covers the full setup flow, login flow, replay prevention, secret encryption, and recovery codes.
#two-factor-authentication#2fa-dotnet
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