Re: [tor-talk] Reasoning behind 10 minute circuit switch?

[Denise's Yahoo Acct <unixgrl70@xxxxxxxxx>]

Nice



> On Oct 14, 2014, at 8:34 PM, Greg Curcio <gregcurcio@xxxxxxxxx> wrote:
> 
> :)
> 
> Greg Curcio
> 
> On Tue, Oct 14, 2014 at 4:31 PM, Jacob Appelbaum <jacob@xxxxxxxxxxxxx>
> wrote:
> 
>>> It was alas picked arbitrarily. As Nick notes, it used to be 30 seconds,
>>> and then when we started getting users, all the relays complained of
>>> running at 100% cpu handling circuit handshakes. We changed it to 10
>>> minutes, and the complaints went away -- at least until the botnet
>>> showed up.
>> 
>> As a side note - from some of my NSA research, we've found that PSC
>> (Persona Session Collection) happens in ten minute windows. That means
>> that a selector will trigger collection and that the collection on
>> related flows will last for around ten minutes.
>> 
>> Might be a good time to reconsider those circuit build times -
>> especially if the above is correct. Hard to know for sure but good to
>> disclose in any case.
>> 
>> Happy hacking,
>> Jacob
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