Re: [tor-talk] On the Theory of Remailers

[Alexandre Guillioud <guillioud.alexandre@xxxxxxxxx>]

My thought are as following. Why keep entropie where you can have chaos ?
I agree that tor is already CHAOS from an exterior point of view, but a
little more is never bad :D

Plus,
> If statistically it's still easy, even
>with a 5 second delay, what's the point in making the software harder
>to use if you're not getting the defense you seek?

What i was saying is no configuration for the end user. Just dispatch on
the first node on the most efficient circuits for the current datatype.

2013/1/9 Tom Ritter <tom@xxxxxxxxx>

> On 9 January 2013 10:33, Alexandre Guillioud
> <guillioud.alexandre@xxxxxxxxx> wrote:
> > Wooo thank's Tom ! First time using mailing lists, i'm going to like it
> :D
> > (and it's not a problem to answer from work :DD).
> > Ok, so i understand what you're meaning by high/low latency network.
> >
> > Just, why don't apply this to web browsing ? Can't each node keep packet
> up
> > to 5 seconde based on random ? 5 second isn't a problem, as tor network
> is
> > already long to serve pages/packets.
> >
> > From  my point of view, you can't allow some sort of different latency
> > paths for clients.
> > It will confuse basics users,
> > And power users will tweak this to allow only low latency circuits.
>
> Allowing a client to choose their 'delay' and combining low and high
> latency networks is (as I understand it) the basis behind Alpha Mixing
> [0].
>
> As far as a 5 second window in Tor nodes - off the top of my head, I'm
> not sure 5 seconds would really gain anything.  If the nodes you're
> using (.e.g bridges) aren't used much, 5 seconds doesn't help you.  On
> the other hand, adding 30 seconds (3 hops, 2 directions) to *each*
> request, keeping in mind a page maybe have 20 requests quickly makes
> web browsing near-unusuable.
>
> The other elephant in the room is that *even with* high latency, given
> *enough* traffic, you can always link it statistically.  Think of it
> this way: If I'm sending a packet a day to a recipient, you can see a
> packet a second leave my machine, and a packet a day received at the
> other end.  Even if my message is mixed well, held for an hour and
> mixed with other messages - it's not hard after a few days to realize
> the correlation.  High latency makes this harder, harder still if you
> don't have a regular pattern.  If statistically it's still easy, even
> with a 5 second delay, what's the point in making the software harder
> to use if you're not getting the defense you seek?
>
> I'm not the authority on Tor's design decisions, but those are my thoughts.
>
> -tom
>
> [0] http://www.freehaven.net/doc/alpha-mixing/alpha-mixing.pdf
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