# Chairman

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

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## Bio

Nat Sakimura has chaired the OpenID Foundation for many years and is a primary author of the OpenID Connect specifications and the FAPI security profile used by open banking implementations worldwide.

Profile built from public OpenID Foundation and IETF records.

## Where their work shows up

Sakimura's authorship runs through [OpenID Connect](https://startwithidentity.com/standards/openid-connect/) and the [FAPI](https://startwithidentity.com/standards/fapi/) security profile, which became the de facto baseline for open banking worldwide and, through [PSD2](https://startwithidentity.com/glossary/psd2/), for European payment authentication. FAPI is the best available template for any high-value API, not just financial ones.