Note there was a W3C community group that explored the "HTTPS on local networks" question. It's closed now but they wrote use cases and proposals: https://www.

Note there was a W3C community group that explored the "HTTPS on local networks" question. It's closed now but they wrote use cases and proposals: https://www.w3.org/community/httpslocal/ https://www.w3.org/community/httpslocal/ https://httpslocal.github.io/proposals/ https://httpslocal.github.io/proposals/ https://httpslocal.github.io/usecases/ https://httpslocal.github.io/usecases/ I wish some of this work would continue as well.