PyPI users: To increase the security of PyPI downloads, we're beginning to introduce two-factor authentication (2FA) as a login security option, and want project maintainers and owners to start testing it.
Starting this Friday, May 3rd, you'll be able to use 2FA on [Test PyPI](http://test.pypi.org/). And if you'd like to try 2FA on [official PyPI](https://pypi.org), please fill out [this Google form](https://docs.google.com/forms/d/e/1FAIpQLSfRmXhkfAL-LgLfcMdzTG7iIaSwPo-pyzkgv5DzvAU7Q-6XWQ/viewform) so we can invite you to the private beta, which we plan to hold 3-20 May.
PyPI currently supports a single 2FA method: generating a code through a Time-based One-time Password (TOTP) application. After you set up 2FA on your PyPI account, then you must provide a TOTP (along with your username and password) to log in. Therefore, to use 2FA on PyPI, you'll need to provision an application (usually a mobile phone app) in order to generate authentication codes; our [our testing wiki page](https://wiki.python.org/psf/WarehousePackageMaintainerTesting) gives you suggestions and pointers.
This change only applies to the login step, not package uploads.
More details at [our testing wiki page](https://wiki.python.org/psf/WarehousePackageMaintainerTesting).
During this testing period, if things go awry, there's a chance we will need to wipe tokens from users' accounts, so if you choose to try it, please be forewarned. We strongly suggest you make sure you have a PyPI-verified email address on your user account before trying the feature, to make potential account recovery smoother.
And please [let us know](https://github.com/pypa/warehouse/issues/new) if you run into glitches.
We expect to end this testing period on May 20th, then enable the optional 2FA feature for all PyPI users, and move on to working on WebAuthn support.
Thanks to the Open Technology Fund for funding this work. More progress reports at [the Packaging Working Group's wiki page](https://wiki.python.org/psf/PackagingWG).
-Sumana on behalf of the PyPI team
(cross-posted to https://discuss.python.org/t/pypi-two-factor-auth-2fa-trial-may-3-20/1590 )
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