Top 20 NuGet Security Packages

.NET and Xamarin libraries for the AeroGear Mobile Core
A simple, no-drama, reCAPTCHA validation library that works with ASP.NET Core, Razor Pages, MVC 5, and WebForms.
Crypteron CipherDB Agent for NHibernate 4.x
SAML2P support for IdentityServer 4, allowing SAML2P identity provider functionality. To purchase a license or get a demo license, contact sales@identityserver.com.
tCell Native Agent
Safe deserialization helper library to fix known BinaryFormatter vulnerabilities.
This library contains security functions for WPF applications.
Authentication and service implementation for the Twitter API.
.Net library for two-factor (or multi-factor) authentication using TOTP and QR-codes.
OpenID Connect server middleware for OWIN/Katana.
Modern, free, open-source, professionally audited .NET crypto library.
A forms authentication provider for Nancy.
Web API intgration package for resource/action based authorization.
Authentication library for the veracity services sdk
A .Net port of jBCrypt implemented in C#. It uses a variant of the Blowfish encryption algorithm’s keying schedule, and introduces a work factor, which allows you to determine how expensive the hash function will be, allowing the algorithm to be "future-proof".
NWebsec attributes for ASP.NET Core MVC applications. NWebsec helps you set important security headers, detect potentially dangerous redirects, and control cache headers. See project website for documentation.
Owin Framework authorization middleware that checks if the identity making the request has permission to do so and returns a 403 response if it does not
tCell .Net Agent Packages\nThis package bundles the packages.config file to enable packages discovery.
MCART for Windows Presentation Framework
MCART .Net Standard Edition