[freenet-dev] Routing enhancement

[Matthew Toseland]

On Thursday 12 June 2008 23:45, Michael Rogers wrote:
> Matthew Toseland wrote:
> > The information is available now from swapping, it's a question of making 
it 
> > more reliable, up to date and accurate.
> 
> Right, I'm just pointing out that attackers like reliable, up to date,
> accurate information too. :-)
> 
> > Long-term intersection attack: Correlate the time at which inserts, 
requests 
> > etc which can be tied to a specific identity happen with the time at which 
a 
> > specific node is known to be online or offline. Generally this is much 
less 
> > of a threat to Freenet than to a real-time mixnet.
> 
> Depends on the application - it could be used to identify Frost/FMS
> posters, for example.

Right. A general solution is to introduce arbitrary delays at each hop during 
the encrypted tunnel; this is what mixmaster remailers do. Of course if you 
want your post to arrive quickly this doesn't work. And we'd have to figure 
out a way to build tunnels anyway!
> 
> > The mechanism we are 
> > describing would make it easier but only when attacking your peers' peers. 
> 
> My peers' peers are about 400 nodes (more if I raise my connection limit).

Significantly less than that surely; small world has significant overlap 
between my peers and my peer's peers for any given peer, that's a fairly 
basic property without which routing won't work well. Small world networks 
have *both* fast mixing and clustering...
> 
> Cheers,
> Michael
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