---
title: "Speaking at NDC Copenhagen 2025"
description: "In September 2025 I spoke at NDC Copenhagen. My talk “Demystifying Authentication in ASP.NET Core” walks through schemes, ClaimsPrincipal and cookies."
url: https://tn-data.se/tn-data-at-ndc-copenhagen-2025/
type: post
lang: en
date: 2025-05-27
author: "Tore Nestenius"
site: https://tn-data.se/
image: https://tn-data.se/_astro/ndc.Be8OSYtF_Z1vQmFT.webp
---

# Speaking at NDC Copenhagen 2025

![NDC Copenhagen Developers Festival 2025](https://tn-data.se/_astro/ndc-768x432.Bcr_JuuW_Z1WFpFq.webp)

# Speaking at NDC Copenhagen 2025

**Update:** the recording of the talk is on [YouTube](https://www.youtube.com/watch?v=hEazKs0QNTw).

I will be presenting at [NDC Copenhagen Developers Festival](https://ndccopenhagen.com) this September. It is my first time speaking at this conference.

### About the NDC Copenhagen Developers Festival

The [NDC Copenhagen Developers Festival](https://ndccopenhagen.com) takes place in September 2025. It brings together developers and technology professionals from all over the world.

### Session: Demystifying Authentication in ASP.NET Core

My talk, "[Demystifying Authentication in ASP.NET Core](https://tn-data.se/talks/openid-connect/#demystifying-authentication-in-aspnet-core)," is about one of the most misunderstood parts of web application development. It walks through the ASP.NET Core authentication system: authentication schemes, ClaimsPrincipal, session cookies and good practices for putting it together. The aim is to help developers build and maintain their authentication with more confidence.

### Why This Matters

Authentication is critical in web applications, but it is often implemented without a full understanding of how it works underneath. That can lead to security holes and code that is hard to maintain.

NDC is one of the big developer conferences in Europe, so it is a good place to share this with the .NET community.

You can find more information at [ndccopenhagen.com](https://ndccopenhagen.com).

If your organization wants ASP.NET Core training or consulting on authentication and security, [contact me](https://tn-data.se/contact/).