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

[Greg Curcio]

:)

Greg Curcio

On Tue, Oct 14, 2014 at 4:31 PM, Jacob Appelbaum <jacob at appelbaum.net>
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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