HTTP Message Signatures
ietf.org
ietf.org
Webpackage has a lot of stuff that seems super cool to me. Alas it seemed mainly to be a small handful of engineers & most seemed to have moved on from the effort. https://github.com/WICG/webpackage/issues/713
Given the frosty response in the comments they got I guess I'm not shocked, but in general it feels like web standards could use better long term care, that they often don't get, alas.