Top 20 NuGet security Packages

Squire framework security API.
Barricade is a lightweight membership system. An ASP.NET Web API security library that implements OAuth 2 authentication and claim based authorizations.
APIFrame is a C#.NET library that implements the core components required for ASP.NET Web API development. It's a class library with logical separation of Client, Server and the supporting Framework.
Basic Authentication implementation for fluent security. No tests in place as I just wanted to throw this up to get things working. See readme.md for examples of how to use.
Latch is a service that lets you add an extra level of security to your online services to help prevent any unauthorized use.
Extensible versions of common Owin Oauth Middleware (Facebook, Google, Microsoft, etc) that allow for multi-tenant and other complex scenarios.
A high level abstraction over the Windows Certificate store, providing a simplified access model and informative exceptions to aid developers working with X.509 Certificates and the Windows Certificate Store.
Update visual name; all files which are located deeper than 1 directory now got the prefix "|--"
This package contains basic classes to implement a custom claim based security system
A unified, simple to use library that enables developers storing, accessing, updating and deleting keys and passwords on multiple platforms. Internally, the library uses iOS KeyChain and Android KeyStore features. The library exposes KeyChainHelper which is a simple one-entry to the library on all p...
Check reCAPTCHA response in .Net
Windows Prison
Simple OWIN stateful token authentication middleware for when you want to store token in database
Foundational security constructs for NetChris operations.
Contains common functionality used by other Quantum Concepts assemblies.
Contains common functionality used by other Quantum Concepts assemblies.
Contains common functionality used by other Quantum Concepts assemblies.
Contains common functionality used by other Quantum Concepts assemblies.
Contains common functionality used by other Quantum Concepts assemblies.
Standard Windows security editor dialog for .NET derived from CommonDialog and implementing the Windows EditSecurity API.