Re: CNN.com - WiFi activists on free Web crusade - Nov. 29, 2002
Eugen Leitl wrote:
On Sun, 1 Dec 2002, Dave Howe wrote:
ah. Sorry, I don't think of dns as a name service (apart from once removed) - we are talking DHCP or similar routable-address assignment.
You can use GPS as naming service (name collisions are then equivalent to physical space collisions). You can actually label the nodes automagically, once you know that it's a nearest-neighbour mesh spanned over patches of Earth surface. You can use signal strenght and relativistic ping to make mutual time of flight triangulation. It is a good idea to use a few GPS anchor nodes, so that all domains are consistent.
What I don't understand is how a node knows the location of a person who moves about in the first place. Also, I don't like the idea that my location is known by the location of my equipment. But I know very little about geographical routing. -- Peter Fairbrother
On Mon, 2 Dec 2002, Peter Fairbrother wrote:
What I don't understand is how a node knows the location of a person who moves about in the first place.
The node spans a cell. Similiar to your cellular phone, you can link an ID to a cell. Within the cell you can use relativistic ping and/or signal strength (that's how mobile phone localization is done today). Since cells overlap you've got a lot of constraints to get a position fix.
Also, I don't like the idea that my location is known by the location of my equipment. But I know very little about geographical routing.
Your location is already known, whether you're using wire or wireless. Wireless has limited range, cables are expensive enough so that their lenght is being minimized. Traceroutes and signal pings and already existing IP location databases make anonymity a myth. The only way to address it is to use anonymizing proxies/traffic remixing. Geographic routing is intrinsically resistant to address spoofing (neighbours will refuse routing packets from obviously bogus origin). If you want to avoid disclosing your physical location, use a higher, anonymizing protocol layer.
Simple. Signal strength from at least three access points will pinpoint your location. If any of the AP's have known GPS coordinates, your location can be interpolated. To fix this, change your MAC address (or whatever WiFi uses for that), randomly every time you move around, and don't share things that can identify your machine. i.e don't run things such as SMTP, FTP, Microsoft File sharing which give away your host name, and don't accept cookies from web sites that can track you, and make sure your browser doesn't leak your email address, and be aware that anything you do can be sniffed. ----------------------Kaos-Keraunos-Kybernetos--------------------------- + ^ + :NSA got $20Bil/year |Passwords are like underwear. You don't /|\ \|/ :and didn't stop 9-11|share them, you don't hang them on your/\|/\ <--*-->:Instead of rewarding|monitor, or under your keyboard, you \/|\/ /|\ :their failures, we |don't email them, or put them on a web \|/ + v + :should get refunds! |site, and you must change them very often. --------_sunder_@_sunder_._net_------- http://www.sunder.net ------------ On Mon, 2 Dec 2002, Peter Fairbrother wrote:
What I don't understand is how a node knows the location of a person who moves about in the first place.
Also, I don't like the idea that my location is known by the location of my equipment. But I know very little about geographical routing.
participants (3)
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Eugen Leitl -
Peter Fairbrother -
Sunder