https://spec.torproject.org/proposals/360-hsdesc-len-limit.html
This proposal describes a mechanism for preventing some kinds of
traffic-flooding attacks by HSDirs. It's based on some of Mike
Perry's work on Proposal 349.
Please feel free to open tickets on gitlab, or to discuss here.
Discussion
https://spec.torproject.org/proposals/359-cgo-redux.html
This proposal instantiates a new approach for encrypting relay cells
on circuits, to prevent certain kinds of tagging attacks, to improve
forward secrecy, and more. It is based on research by Jean Paul
Degabriele, Alessandro Melloni, Jean-P
