Category Archives: IdentityServer

Use explicit typing for your JWTs

JWTs are being used in many places these days – identity tokens, access tokens, security events, logout tokens… You actually have to be careful when validating a JWT that you don’t mistakenly confuse it with a JWT that was issued … Continue reading

Posted in IdentityServer, OAuth | Leave a comment

Two is the magic Number

..and not 3. To build authentication systems for modern applications, all you need to understand are two OpenID Connect / OAuth 2.0 flow. That’s it. Client Credentials Flow This is probably the simplest flow and it is designed for server … Continue reading

Posted in ASP.NET Core, IdentityServer, OAuth, OpenID Connect | Leave a comment

IdentityServer for ASP.NET Core 3

In short: is released (along with the introspection and access control validation handler). As part of the longer version, you might ask yourself how we can do that before ASP.NET Core 3 itself is released. Well – it’s a slightly complicated … Continue reading

Posted in ASP.NET Core, IdentityServer, Uncategorized | 2 Comments

End of IdentityServer3 free Support

Back in 2017 we announced the end of IdentityServer3 maintenance. This excluded security bug fixes. As of the 1st of July 2019 Microsoft officially ended support for Katana 3. This means that the platform we originally built-against is now unsupported … Continue reading

Posted in IdentityServer, Katana, Uncategorized | 1 Comment

IdentityServer4 Roadmap

We didn’t have a lot of time recently to work on IdentityServer4 – and yes, I know there are a lot of open “backlog” issues right now. But fortunately everything is pretty stable and from the open issues, nothing seems … Continue reading

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Try Device Flow with IdentityServer4

The biggest new feature in IdentityServer4 v2.3 is support for the beta Device Flow specification. Device Flow is a flavour of OAuth 2.0 optimised for browserless and/or input-constrained devices. Things like TVs, gaming consoles, printers, cash registers, audio appliances etc. … Continue reading

Posted in ASP.NET Core, IdentityServer, OAuth | Leave a comment

What happened in 2018?

2018 has been really busy. We worked on a lot of different things, and I just realized that I only wrote eight blog posts in total. I decided to block December to catch up on many work and non-work related … Continue reading

Posted in .NET Security, ASP.NET Core, IdentityModel, IdentityServer, PolicyServer, Uncategorized | Leave a comment