[tor-bugs] #17857 [Tor]: Create a consensus param to disable (netflow) padding if RSOS is enabled (was: Disable (netflow) padding if RSOS is enabled)
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Wed Dec 16 00:33:52 UTC 2015
#17857: Create a consensus param to disable (netflow) padding if RSOS is enabled
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Reporter: teor | Owner:
Type: enhancement | Status: new
Priority: Medium | Milestone: Tor: 0.2.8.x-final
Component: Tor | Version:
Severity: Normal | Resolution:
Keywords: | Actual Points:
Parent ID: #17178 | Points:
Sponsor: |
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Description changed by mikeperry:
Old description:
New description:
Because RSOS and Proposal 252 both appear to cause an onion service to
make a lot of orconns to many relays, the total overhead of the netflow
padding defense will be much larger for these services.
In an ideal world, we'd find some way to minimize the number of orconns
that these services make, because the increased level of connection
multiplexing would be better against traffic analysis attacks, and thus
also mean less overhead for padding defenses (including netflow padding,
but beyond that as well).
In the meantime, however, we should provide the ability to disable netflow
padding via the consensus for these services. With a consensus param, we
can monitor the netflow padding overhead in relay extra-info descriptors,
and experiment with turning padding for RSOS/SOS on and off while
observing the change in total overhead at relays.
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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17857#comment:2>
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