Author Archives: Dominick Baier

Refresh Tokens in IdentityServer4 v4

I already wrote about the hardening of refresh tokens in this post. I would recommend reading this first. The upcoming OAuth 2.1 spec is pretty clear about refresh token handling: If the client is confidential, the refresh token must be … Continue reading

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Announcing IdentityServer4 v4.0

OK – it’s finally done. I published v4 to Nuget earlier today. You can find the complete set of changes/bug fixes/breaking changes here. We had to cut some features which were originally on our roadmap – we’ll revisit them for … Continue reading

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Resource Access in IdentityServer4 v4 and going forward

In my last post I alluded to the tension between real-world token-based security architectures, the OAuth 2.0 scope model, JWT access tokens and the audience claim. We went through a couple of iterations in IdentityServer how we deal with those … Continue reading

Posted in IdentityServer, OAuth | 4 Comments

I don’t like Identity Tokens

…or rather the name ;) I bet that if you wake up most “identity professionals” in the middle of the night and ask them what an identity token is, the answer would be “a token about the identity of the … Continue reading

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The JWT Profile for OAuth 2.0 Access Tokens (and IdentityServer)

As part of creating our new Advanced OAuth training, I created a whole lecture on the evolution of access tokens and resource access. It’s fascinating – since the original OAuth 2.0 spec does not have any information about the token … Continue reading

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Updates on our Workshops

I am pleased to announce that we are now offering two workshops. I was mentioning that on Twitter already, and got a lot of questions. So I thought it would make sense to summarise them all in one place. You … Continue reading

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Automatic Token Management for ASP.NET Core and Worker Services 1.0

After a pretty long preview period, I am happy to announce that IdentityModel.AspNetCore 1.0 is now on Nuget. This library solves a problem that we have with every single OIDC/OAuth client we are creating: token management. Requesting and using a … Continue reading

Posted in .NET Security, ASP.NET Core, IdentityServer, OAuth, OpenID Connect | 1 Comment

Major Update to IdentityModel.OidcClient

I just pushed Preview 3 of the 4.0 version of IdentityModel.OidcClient – this includes some major updates (that you might or might not have asked for): Removal of OpenID Connect Hybrid Flow. The codebase does Authorization Code Flow + PKCE … Continue reading

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SPAs are dead!?

clickbait isn’t it? But this was Brock’s immediate reaction when we saw (and I recommend you read this first): Full Third-Party Cookie Blocking and More What this basically means is, that browser are getting more and more strict with how … Continue reading

Posted in OAuth, OpenID Connect | 21 Comments

Online Workshops in 2020

For obvious reasons, all in-person workshops have been cancelled for the time being. This is frustrating on one hand, but converting them to an online format, will allow people to attend who otherwise wouldn’t make it. The other upside is, … Continue reading

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