[draft] add PyPI GA post

content/pypi-attestations-ga.md

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+title = "PyPI's Sigstore-powered attestations are now generally available"
+date = "2024-11-14"
+tags = ["sigstore", "security", "pypi", "python"]
+draft = false
+author = "William Woodruff (Trail of Bits), Dustin Ingram (Google), Hayden Blauzvern (Google)"
+type = "post"
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+
+*Check out the [PyPI blog] and [Trail of Bits blog] for more user-facing and
+technical details, respectively!*
+
+Over the past year, the Google Open Source Security Team
+and [Trail of Bits] have worked together to implement [PEP 740],
+a Python packaging standard that allows users to upload Sigstore-based
+attestations to the [Python Package Index].
+
+Today we're pleased to announce that attestation support on PyPI is
+**generally available**, meaning that project maintainers
+can submit attestations for both PyPI and downstream users to verify.
+
+An important piece of the story for attestations on PyPI is
+**default enablement**: if a project uses [Trusted Publishing]
+and the [canonical GitHub Action] then they'll produce
+attestations by default, with no changes required.
+
+This works because Trusted Publishing already uses the same [OpenID Connect]
+building blocks as Sigstore, meaning that existing workflows can use
+[keyless signing]. In other words: generating and uploading attestations
+requires **no key management by the project's maintainers**, and brings
+Sigstore's key [transparency and auditability properties].
+
+Thanks to this default stance, adoption of attestations by publishers has been
+rapid: over 20,000 individual attestations have been uploaded to PyPI so far,
+and just over 5% of the top 360 projects are already publishing attestations:
+
+![](/images/pep740.png)
+
+To keep track of the ecosystem's overall progress, follow along with
+[Are we PEP 740 yet?], which is automatically updated as more top projects
+release new, attested versions.
+
+[PyPI blog]: https://blog.pypi.org/posts/2024-11-14-pypi-now-supports-digital-attestations/
+
+[Trail of Bits blog]: https://blog.trailofbits.com/2024/11/14/attestations-a-new-generation-of-signatures-on-pypi/
+
+[Trail of Bits]: https://www.trailofbits.com/
+
+[PEP 740]: https://peps.python.org/pep-0740/
+
+[Python Package Index]: https://pypi.org
+
+[Trusted Publishing]: https://docs.pypi.org/trusted-publishers/
+
+[canonical GitHub Action]: https://github.com/pypa/gh-action-pypi-publish
+
+[Are we PEP 740 yet?]: https://trailofbits.github.io/are-we-pep740-yet/
+
+[OpenID Connect]: https://openid.net/developers/how-connect-works/
+
+[keyless signing]: https://docs.sigstore.dev/cosign/signing/overview/
+
+[transparency and auditability properties]: https://docs.sigstore.dev/logging/overview/