Top 20 NuGet Security Packages

Operations and data types used with the ArcGIS REST API.
An activity based security framework for ASP.NET WebApi
An implementation of HMAC for ASP.NET WebApi
Lib.AspNetCore.Mvc.Security is a library which provides additional control over security features like Content Security Policy for ASP.NET Core MVC
Set of tools for XrmToolBox regarding security management
An ASP.NET Core endpoint to report vulnerable runtimes
Access Security Roles for multiple roles/entities and produce architecture Security Model artifacts/documents in Microsoft Dynamics 365
Cross platform plugin for Firebase Authentication
OAuth 2.0 authorized HttpClient, friendly with HttpClientFactory
MongoDB stores for OpenIddict.
Security Management for Asp.Net Core projects.
A SAML2 Service Provider for ASP.NET MVC. Install in project and add sections to web.config. No coding required. The package adds an MVC controller that handles SAML SignIn and SignOut. It works with the claims model of .NET and uses the present infrastructure for session authentication cookies etc.
vulnerabilities.
This code allows to fake a Jwt Bearer and build integration tests for an ASP.Net Core application. Using this, we can fake any authentication we need, without the need to really authenticate a user.
A library for enabling ASP.Net Identity to work with Umbraco front-end members
SecureBlackbox - the comprehensive suite of components and classes for digital security and secure networking. NOTE: this package contains only libraries. For samples and documentation, please, download the full package from the product web site.
A library for enabling ASP.Net Identity to work with Umbraco front-end members
Allows you to perform user authentication via DigitalOcean, Facebook, Foursquare, GitHub, Google, Instagram, LinkedIn, MailRu, Odnoklassniki, Salesforce, Twitter, VK (Vkontakte), Windows Live, Yandex just in two method calls.
The DevDefined.OAuth project is a library for creating both OAuth consumers and providers on the .Net Framework. It currently targets the .Net Framework 3.5 and above, and is written in C#.
User security base for developing apps with .NET