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

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Hello, I really don't understand why I should pass `timeWindowUsed` for the `VerifyTotp` method. It is required param? What it is the number, I should save it? Please, provide case...

compliant with some documentation I found [here](https://github.com/google/google-authenticator/wiki/Key-Uri-Format) in the (old) google authenticator repository.

I added .net 5 to projects TargetFrameworks and did small refactoring changes. Also, I signed assembly with SNK key, because PFX key signing is no longer supported for .net 5.

[Notification][Install] Install failed (project: GoogleAuth, package: Otp.NET v1.2.2) Could not install package 'Otp.NET 1.2.2'. You are trying to install this package into a project that targets '.NETFramework,Version=v4.0,Profile=Client', but the package...

The existing mod operation will truncate the result to 6 digits making the call to Digits irrelevant and preventing the creation of a code larger than 6 digits.

Hello, how to use TOTP for One Time Use (Only to be able to verify only one time ) Thank you

We have `Totp.RemainingSecods()` which however does not indicate when the current time window started. There is no way to find out the steps that the `Totp` was created with (#45)...

Hello everyone, I am using the library [dart-otp](https://github.com/daegalus/dart-otp) in a flutter app that generate the code and i need to validate this code in c# but i couldn't validate this...

Can some please help with this as i am stuck really. If i create the QRcode and set it up with an authnticator the validate all works fine. However if...

Google, Microsoft, Duo can successfully scan TOTP QrCodes and work flawlessly with this library. However Authy does not seem to recognize the token format at all, when it clearly states...