Earlier this year, Brett Cannon consulted with Donald and updated the status of PEP 458 to Deferred. https://github.com/python/peps/pull/931
The PEP status is now Draft again and the new proposed title is
"PEP 458: Secure transport independent download integrity for PyPI packages"
Current discussion is happening on Discourse:
-- Sumana Harihareswara Changeset Consulting https://changeset.nyc