Thus spake Nick Mathewson (nickm@torproject.org):
159 Exit Scanning
This is an overview of SoaT, with some ideas for how to integrate it into Tor. Mike, is this implemented? Done? Superseded? Still open?
We are most of the way through the "Human Review" phase of this proposal, but only for the HTTP and HTTPS versions of the scans. I would like to re-enable HTML, and implement an SSH scan, too. The authority integration pieces are not present in either tor core or the scanners.
xxx-exit-scanning-outline.txt
Looks like this was superseded by 159?
Yes, and also the 2009 HotPETS paper on TorFlow.