--- title: ASP.NET Core Authentication - The Dirty Details - Chris... description: A deep dive into ASP.NET Core's authentication system, covering the IAuthenticationHandler interface and its four core methods, the handler class hierarchy... canonical: https://daily.dev/posts/asp-net-core-authentication---the-dirty-details---chris-klug---ndc-copenhagen-2026-h0uqt7p5o twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: ASP.NET Core Authentication - The Dirty Details - Chris Klug - NDC Copenhagen 2026 | daily.dev og:description: A deep dive into ASP.NET Core's authentication system, covering the IAuthenticationHandler interface and its four core methods, the handler class hierarchy... og:url: https://daily.dev/posts/asp-net-core-authentication---the-dirty-details---chris-klug---ndc-copenhagen-2026-h0uqt7p5o og:image: https://api.daily.dev/og/posts/h0UqT7P5o.png og:image:alt: ASP.NET Core Authentication - The Dirty Details - Chris Klug - NDC Copenhagen 2026 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # ASP.NET Core Authentication - The Dirty Details - Chris Klug - NDC Copenhagen 2026 **[NDC Conferences](https://daily.dev/sources/ndc)** · 63 min read · 0 upvotes · 0 comments ## Summary A deep dive into ASP.NET Core's authentication system, covering the IAuthenticationHandler interface and its four core methods, the handler class hierarchy (sign-in, sign-out, remote authentication handlers), AuthenticationSchemeOptions, policy schemes, and how middleware wires everything together. The talk includes live demos of a custom facial-recognition authentication handler and a fake remote identity provider, illustrating how to build fully custom authentication schemes from scratch, including session management, CSRF correlation, and the IAuthenticationRequestHandler pattern. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [ASP.NET Core Security Explained: Modern Authentication, Authorization, and JWT](https://daily.dev/posts/asp-net-core-security-explained-modern-authentication-authorization-and-jwt-bgq4u3gn4) · Syncfusion · 4 upvotes · 0 comments - [Use multiple schemes in an ASP.NET Core Web application](https://daily.dev/posts/use-multiple-schemes-in-an-asp-net-core-web-application-umx6qkvz9) · Damien Bowden · 3 upvotes · 1 comments - [.NET 10: What’s New for Authentication and Authorization](https://daily.dev/posts/net-10-what-s-new-for-authentication-and-authorization-0mnjaiuqi) · Auth0 · 82 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#authentication](https://daily.dev/tags/authentication), [#c#](https://daily.dev/tags/c#), [#aspnet](https://daily.dev/tags/aspnet) [View this post on daily.dev](https://daily.dev/posts/asp-net-core-authentication---the-dirty-details---chris-klug---ndc-copenhagen-2026-h0uqt7p5o) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"ASP.NET Core Authentication - The Dirty Details - Chris Klug - NDC Copenhagen 2026","url":"https://daily.dev/posts/asp-net-core-authentication---the-dirty-details---chris-klug---ndc-copenhagen-2026-h0uqt7p5o","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/asp-net-core-authentication---the-dirty-details---chris-klug---ndc-copenhagen-2026-h0uqt7p5o"},"datePublished":"2026-08-05T08:32:12.761Z","dateModified":"2026-08-05T08:32:32.471Z","description":"A deep dive into ASP.NET Core's authentication system, covering the IAuthenticationHandler interface and its four core methods, the handler class hierarchy...","image":"https://i.ytimg.com/vi/vZC9wLWU3i0/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/vZC9wLWU3i0/sddefault.jpg","isAccessibleForFree":true,"articleSection":"NDC Conferences","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"NDC Conferences","logo":"https://media.daily.dev/image/upload/s--SiIyojEj--/f_auto/v1748760369/logos/ndc","url":"https://daily.dev/sources/ndc"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/asp-net-core-authentication---the-dirty-details---chris-klug---ndc-copenhagen-2026-h0uqt7p5o","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,authentication,c#,aspnet","timeRequired":"PT63M","video":{"@type":"VideoObject","name":"ASP.NET Core Authentication - The Dirty Details - Chris Klug - NDC Copenhagen 2026","description":"A deep dive into ASP.NET Core's authentication system, covering the IAuthenticationHandler interface and its four core methods, the handler class hierarchy...","thumbnailUrl":"https://i.ytimg.com/vi/vZC9wLWU3i0/sddefault.jpg","uploadDate":"2026-08-05T08:32:12.761Z","duration":"PT63M","url":"https://api.daily.dev/r/h0UqT7P5o","embedUrl":"https://www.youtube.com/embed/vZC9wLWU3i0"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"NDC Conferences","item":"https://daily.dev/sources/ndc"},{"@type":"ListItem","position":3,"name":"ASP.NET Core Authentication - The Dirty Details - Chris Klug - NDC Copenhagen 2026"}]} ```