[tor-relays] Reduced number of HSDir's

SiNA Rabbani sina at redteam.net
Sat Jan 3 01:57:11 UTC 2015

There was a new line added to authority director configs, which was a response to the recent Sybil attack [1]:
MinUptimeHidServDirectoryV2 96 hours

That's only 4 days, I wonder if anything else has changed.


[1] https://lists.torproject.org/pipermail/tor-consensus-health/2014-December/005381.html

"Be the change that you wish to see in the world." - Mahatma Gandhi

----- On Jan 2, 2015, at 2:51 PM, Sebastian G. <bastik.tor> bastik.tor at googlemail.com wrote:

> 02.01.2015, 19:47 Kura:
>> I think something must have happened, I restarted half a dozen or so
>> of my relays over a week ago and none of them have been given the
>> HSDir flag, which if I remember rightly is a 21 hour flag? I may be
>> mistaken but, I would have expected that flag to be back with over a
>> week of uptime.
> It used to be a 25 hour flag. 1 day plus an additional hour.
> I think (yes, that says I don't know) the period being longer than 24
> hours had something to do with an attack to get relays under adversary
> control in the right position to become a HSDir for some
> hidden-services. If one pays for a relays by days an additional hour is
> an additional day for an attacker.
> I may have missed something, but maybe it was raised.
> I do remember that changes to Guards took place, like requiring them to
> have more bandwidth and to reducing the number of Guards clients would
> use. This was due to research.
> Regards,
> Sebastian
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