Top 20 NuGet Security Packages

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Corporate claim definitions and ClaimsPrincipal extensions.
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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.
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Rebex.Pop3 is part of Rebex Secure Mail - a set of mail libraries that provide all you need for sending, receiving, encrypting, decrypting, signing, verifying, loading, saving and processing e-mail messages. Includes IMAP, EWS (Exchange Web Services), POP3 and SMTP clients; a high-level MailMessage ...
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Rebex.Imap is part of Rebex Secure Mail - a set of mail libraries that provide all you need for sending, receiving, encrypting, decrypting, signing, verifying, loading, saving and processing e-mail messages. Includes IMAP, EWS (Exchange Web Services), POP3 and SMTP clients; a high-level MailMessage ...
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Rebex.Smtp is part of Rebex Secure Mail - a set of mail libraries that provide all you need for sending, receiving, encrypting, decrypting, signing, verifying, loading, saving and processing e-mail messages. Includes IMAP, EWS (Exchange Web Services), POP3 and SMTP clients; a high-level MailMessage ...
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Rebex.Ews is part of Rebex Secure Mail - a set of mail libraries that provide all you need for sending, receiving, encrypting, decrypting, signing, verifying, loading, saving and processing e-mail messages. Includes IMAP, EWS (Exchange Web Services), POP3 and SMTP clients; a high-level MailMessage A...
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Stormpath middleware for ASP.NET Core. Easily add authentication and authorization to ASP.NET Core applications.
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simple, no database required authentication for ASP.NET Core
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OAuth2 introspection middleware for OWIN/Katana.
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Best.EntLib Security lib for .NET Core and .NET 4.6+
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Used with SimpleAuthentication, provides automated configuration for ASP.NET Mvc projects.
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A F# implementation of the Hawk authentication protocol. Few dependencies. No cruft.
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Yoti .NET SDK, providing Yoti API support for Login, Verify (2FA) and Age Verification
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SPID authentication, SAML2 compliant.
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OpenIddict binders for ASP.NET Core MVC.
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Easy-to-use OpenID Connect server for ASP.NET Core.
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An NHibernate IUserAuthRepository to persist User registration and authentication info in any RDBMS NHibernate supports. Implements ServiceStack's built-in AuthProvider Model: https://github.com/ServiceStack/ServiceStack/wiki/Authentication-and-authorization inc. Twitter, Fac...
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Adds OpenId Auth Providers for use in ServiceStack 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...
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Adds OAuth2 Providers for use in ServiceStack Web and REST Services. Includes built-in support for Google and LinkedIn OAuth2 providers. More Info on Auth Providers: https://github.com/ServiceStack/ServiceStack/wiki/Authentication-and-authorization
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OWIN middleware for providing a resource/action based authorization manager.