In part 1 we learned about cookie-based authentication in ASP.NET Core and discussed the difference between authentication and challenge. In this post we are going to investigate the challenge portion in more depth.
![hero image for Authentication Part 2: The Challenge in ASP.NET Core 5](https://blognet.blob.core.windows.net/images/aspnetcore-authn-part2.png)
In part 1 we learned about cookie-based authentication in ASP.NET Core and discussed the difference between authentication and challenge. In this post we are going to investigate the challenge portion in more depth.