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Identity Protocol Debugger + IDPTools Series

July 18, 2026by Robert Broeckelmann
  • Debugging
  • OAuth2
  • Open Source
  • Tools
  • Series
  • Identity

This is a collection of blog posts about my OpenSource Software Project, OAuth2 / OIDC Debugger.

  • OpenID Connect (Authorization Code Flow) with Red Hat SSO
  • OAuth2 Implicit Grant with Red Hat SSO v7.1
  • OAuth2 Resource Owner Password Credential Grant with 3Scale and Red Hat SSO
  • Refresh Token Support in OAuth2 + OIDC Debugger
  • Apigee Edge OAuth2 and Third-Party Identity Providers
  • Introducing IDPTools: An Open Source OAuth2 & OpenID Connect Debugger
  • The OAuth2/OIDC Debugger Has Learned a New Trick: SAML2 Support Is Here
  • Our Identity Protocol Debugger Now Supports WS-Trust
  • Identity Protocol Debugger Now Supports SD-JWT VC Issuance and Presentation Flows
  • DPoP Support Comes to the Identity Protocol Debugger
  • WS-Federation Support Comes to the Identity Protocol Debugger

Originally published on Medium.

More articles

Bearer, Proof of Possession, and Sender Vouches: Three Ways to Trust an Identity

August 20, 2026
  • Access Tokens
  • Authorization
  • Identity & Access Management

One of the most fundamental questions in any identity or authorization system is how does the system know that the party presenting a credential is actually entitled to use it?

Read article →: Bearer, Proof of Possession, and Sender Vouches: Three Ways to Trust an Identity

Holder of Key vs. Proof of Possession: Two Sides of Cryptographic Identity

August 19, 2026
  • Access Tokens
  • Authentication
  • Identity & Access Management

For years, identity protocols have used phrases such as Holder of Key, Proof of Possession, Key Binding, and Bearer almost interchangeably.

Read article →: Holder of Key vs. Proof of Possession: Two Sides of Cryptographic Identity

Content Security Policy: Putting the Browser on a Security Diet

August 19, 2026
  • Application Security
  • Web Application Security
  • Security

Web applications have become remarkably powerful.

Read article →: Content Security Policy: Putting the Browser on a Security Diet
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