Top 20 NuGet Security Packages

The .net client for the ThisData API. Get contextual authentication and suspicious login detection for your apps
DSInternals Replication implements a client for the Active Directory Replication Service Remote Protocol (DRS-R). It can be used to remotely extract password hashes from domain controllers.
This provides a wrapper class library for ADAL (https://www.nuget.org/packages/Microsoft.IdentityModel.Clients.ActiveDirectory).
This library contains the OAuth 1.0 authenticator for RestSharp.Portable, which is a port of the OAuth 1.0 authenticator from the original RestSharp project. The authenticator was moved to a different library, to keep the number of dependencies of the RestSharp.Portable package as small as possible....
A Google Authentication client.
Roles Base Access Control for Azure active directory.
Unified OAuth provider for Microsoft work, school, and personal accounts to be used with ASP.NET 4.5 OWIN
An NTLM authentication middleware for OWIN that enables you to use NTLM (Windows) Authentication independently of IIS or HTTPListener. Furthermore it integrates with ASP.NET Identity 2.0 and allows you to have NTLM as yet another mean of authentication toghether with true local application accounts...
NFX CORE Package NFX UNISTACK includes: Application Container + Dependency Injection facilities Configuration engine BigMemory: Local/Distributed piles/heaps, ability to store hundreds of millions of objects resident in memory for long times without killing GC BigMemory Cache - sto...
Embedded and easy to use WS-Federation STS for ASP.NET with minimal configuration. Can be used as a replacement for the deprecated "Identity and Access Control" Visual Studio extension.
OAuth libraries come in all shapes and sizes, however in the .Net land, they only come in one - extra large. This library is made to rectify that. It's a small (~15kb) library, with no dependencies that lets you create WebRequest's and sign them to your hearts content.
NetSqlAzMan is for all Microsoft .NET 4.0 developers that need to manage loosely-coupled applicative authorizations, that is, weakly coupled with source code, in a light and fast way having all these authorizations in a relational database such as MS Sql Server (2000/MSDE/2005/2008/Express).
.NET client for the Apereo Central Authentication Service (CAS)
Gendarme is a extensible rule-based tool to find problems in .NET applications and libraries. Gendarme inspects programs and libraries that contain code in ECMA CIL format (Mono and .NET) and looks for common problems with the code, problems that compiler do not typically check or have not historica...
A simple implementation of OAuth 1.0a and OAuth 2.0 protocols only supporting the consumer serverside flow. Complemented by DotNetAuth.Profiles to make it more better.
Suplex.Security is an application security and RBAC abstraction Layer. Implments hierarchical DACL model and common RBAC model. Suplex Security contains thte POCOs.
A token based authentication library for AspNet Core.
A cross platform library for communicating with the Satoshi Labs' Trezor Hardware Wallet. Supports Android, UWP, .NET Core and .NET Framework with Hid.Net. Support for other platforms can be added with Hid.Net dependency injection
A CAS client for asp.net core
Tool for efficiently managing User's security in Microsoft Dynamics 365 Customer Engagement