On Thu, Jun 12, 2008 at 5:04 PM, Michael Rogers <m.rogers at cs.ucl.ac.uk> wrote: > Ian Clarke wrote: >> I don't see why nodes couldn't inform their neighbors immediately if >> one of their neighbors goes offline, or comes online. > > Seems like it might make correlation attacks easier if you know how many > active neighbours a node has and what their locations are. It might also > make long-term intersection attacks easier by revealing when users are > online.
It is always possible, when you share more information, that you are making attacks easier, although it would be nice to have a specific description of an attack. We may want to think about whether, if I have a darknet neighbor, a "friend", but I am opennet (so I am connected to some strangers), I should share my friend's location with strangers. I can't think of an immediately obvious reason why not, since I'm only revealing their location, not their IP address, but it deserves further thought. Ian. -- Email: ian at uprizer.com Cell: +1 512 422 3588 Skype: sanity
