[tor-bugs] #8240 [Tor]: Raise our guard rotation period
Tor Bug Tracker & Wiki
blackhole at torproject.org
Tue Mar 10 12:57:27 UTC 2015
#8240: Raise our guard rotation period
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Reporter: arma | Owner:
Type: defect | Status: new
Priority: major | Milestone: Tor: 0.2.???
Component: Tor | Version:
Resolution: | Keywords: tor-client needs-proposal
Actual Points: | 023-backport unfrozen
Points: | Parent ID:
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Comment (by asn):
To share Mike's concerns here, I had a long discussion with Paul about
this during the latest dev meeting. He feels that increasing the guard
lifetime to 9 months makes certain attacks much more plausible.
This is especially the case for hidden services, where guard discovery
attacks are easy. I feel persuaded that we should plug these attacks, or
make them harder to succeed, before increasing the lifetime here.
He was also afraid of the effects of this to regular Tor clients as well,
since after we moved from 3 to 1 guard, the middle nodes can link clients
to their guards more reliably. He is afraid that this might allow
profiling of specific users, etc.
I think all the above means, "more research is required".
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8240#comment:42>
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