# Director of Identity Standards

Source: https://startwithidentity.com/experts/aaron-parecki/
Last updated: 2026-08-29
License: content by Start with Identity. Cite the source URL.

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## Bio

Aaron Parecki is one of the most accessible voices in OAuth and OpenID Connect. He maintains oauth.net, wrote OAuth 2.0 Simplified, and is an active contributor to the IETF OAuth working group, including consolidation work behind [OAuth 2.1](https://startwithidentity.com/standards/oauth-2-1/). His explanations have helped a generation of developers implement [delegated authorization](https://startwithidentity.com/standards/oauth-2-0/) correctly.

Profile built from public IETF, oauth.net, and personal-site records.

## Where their work shows up

Parecki's work is the reason most developers can read [OAuth 2.0](https://startwithidentity.com/standards/oauth-2-0/) at all. The consolidation effort behind [OAuth 2.1](https://startwithidentity.com/standards/oauth-2-1/), which makes [PKCE](https://startwithidentity.com/glossary/pkce/) mandatory and removes the implicit and password grants, folds a decade of security guidance into defaults. See [OAuth vs OIDC](https://startwithidentity.com/guides/fundamentals/oauth-vs-oidc/) for the distinction his writing is most often cited to settle.