Otp.NET (nuget): An implementation of TOTP and HOTP which are commonly used for multi factor authentication by using a shared key between the client and the server to generate and verify one time use codes.  For documentation and examples visit the project website on GitHub at https://github.com/kspearrin/Otp.NET
Keywords: otp|totp|hotp|2fa|two|factor|csharp|dotnet|two-factor-authentication