Top 20 NuGet Security Packages

.NET and Xamarin libraries for the AeroGear Mobile Core

A Cross Platform OTP (TOTP HOTP) Library for .NET Core NetStandard

.NET Standard 1.3 implementation of the NoiseSocket Protocol (revision 2 of the spec)

MAF Portal is a services container (IoC) that plugs into other application frameworks to provide robust domain security (authorization) and business logic execution independently from the host framework pipeline.

Adds OpenId Auth Providers for use in StackExpress Web and REST Services. Includes built-in support for Google, Yahoo, MyOpenId and Custom OpenId providers. More Info on Auth Providers: https://github.com/ServiceStack/ServiceStack/wiki/Authentication-and-authorizat...

ASP.NET Core security middleware enabling Alipay authentication.

Google ReCaptcha wrapper class for quick and easy validation (injectable service for ASP.NET Core apps).

QR code provider for TwoFactorAuth.Net using the excellent QRCoder library (https://github.com/codebude/QRCoder/)

Middleware that enables an application to use OpenIdConnect for authentication. Supports Authorization Code, Implicit and Hybrid flows.

Claims-based user account and identity management framework

C# Client Library for querying Semantics3 APIs

SimpleAuthentication is a ASP.NET library that makes it really simple to for developers to add Social Authentication code to an ASP.NET application.

Enables role-based security using Grid Solutions Framework security layer in an ASP.NET application.

OWIN middleware implementation mixing Windows and Forms Authentication.

A scaffold for building an application with Zurb for Applications and .Net that includes OWIN Token based authentication.

Amazon OAuth provider for OWIN to use with ASP.NET 4.5

A token based authentication provider for Nancy.

ASP.NET Server Side Library for The Identity Hub. The Identity Hub makes it easy to connect your app to all major identity providers like Microsoft, Facebook, Google, Twitter, Linked In and more. For more information see https://www.theidentityhub.com

Scope-based Authorization for Web API v2.

OWIN middleware for validating OAuth2 and OpenID Connect scope claims.