Cross-platform console C#/.Net implementation to generate one time passwords (TOTP/HOTP) for open authentication defined by standard RFC's (4226, 6238). Compatible with Google/Microsoft Authenticator apps.

A simple and straightforward HOTP and TOTP generation and verification library for .NET.

HMAC-based one-time password generator. https://www.nuget.org/packages/sim756.HOTP

A Custom OTP Library Supporting TOTP and HOTP for Google, Microsoft, and RFC 6238-Compatible Authentication Integration

SystemEx is a library which extends the functionality of the .NET standard libraries, written in C# 12, targeting .NET 8.0 and later

A simple, easy-to-use one-time password generator implementation for .NET Core 3.1. Compatible with Google Authenticator.

I tried to create my own HOTP generator and confirmatory with .NET 6.

Feature-rich and flexible .NET library for implementation of OTP authenticators and validatiors.

The Valley authenticator is an iOS and Android app which can be used for (multi-factor) authentication codes.

A .NET implementation of TOTP and HOTP for things like two-factor authentication codes.

📱 Two-Factor Authentication (2FA) client for Android + Wear OS