[tor-bugs] #16646 [Tor]: Cannibalized intro point circuits are now 4 hops, instead of 3 (HS-side)
Tor Bug Tracker & Wiki
blackhole at torproject.org
Thu Jul 23 14:39:39 UTC 2015
#16646: Cannibalized intro point circuits are now 4 hops, instead of 3 (HS-side)
-----------------------------------------+----------------------------
Reporter: asn | Owner:
Type: defect | Status: new
Priority: normal | Milestone:
Component: Tor | Version: Tor: 0.2.7
Keywords: tor-hs SponsorR performance | Actual Points:
Parent ID: | Points:
-----------------------------------------+----------------------------
The fix of #16260 makes hidden services establish a 4-hop introduction
circuit, if they cannibalized during introduction circuit construction.
This was done mainly to prevent circuit fingerprinting according to the
latest USENIX paper, but it's unclear whether making only this change
helps with anything.
Hence, the performance penalty of 4-hops might be more important here.
Another question, is how often do introduction circuits get cannibalized?
It might be that it often happens, since this step is done in the very
beginning when there are a few internal circuits lying around. But I might
be very wrong.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16646>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
More information about the tor-bugs
mailing list