Re: [tor-dev] Attack linking Tor circuits

2014-09-19 Thread Otto Huhta
Hello Paul, Nice to hear the issue and our work is of interest to you. I see you already noted the link to my full thesis, but meanwhile I can already answer your question about using somewhat overlapping circuits. This was indeed not considered in the thesis but is something I've have been thinki

Re: [tor-dev] Attack linking Tor circuits

2014-09-19 Thread Paul Syverson
Sorry. I thought I was seeing the full message on my screen but didn't notice there were a few more lines. I'll check out your thesis. -Paul On Fri, Sep 19, 2014 at 09:25:02AM -0400, Paul Syverson wrote: > Hi Otto, > > This looks cool and complements nicely research that I have > back-burnered fo

Re: [tor-dev] Attack linking Tor circuits

2014-09-19 Thread Paul Syverson
Hi Otto, This looks cool and complements nicely research that I have back-burnered for a long time now around what middle relays can observe from guards and how this is affected by the number of guards, amongst other things. The plans to move to a single guard are indeed well underway, so your wor

[tor-dev] Attack linking Tor circuits

2014-09-19 Thread Otto Huhta
Dear Tor developers, We’ve been working on an MSc Thesis project looking into an attack that links different Tor circuits back to the same user, using only information available to a Tor middle node. We’ve discovered that an adversary can quite accurately determine if two consecutive circuits ar