Proposal: Tor User Agent Carousel (TUAC)

[Sebastian Hahn]

On Apr 4, 2008, at 11:16 AM, lxixnxenoise at lavabit.com wrote:
> Hi, thank you for the reply!
>
> "Also, when the user agent changes on a website that you logged  
> onto, they
> are going to link the two"
>
> This is a good point, if the rotation occurs during the period of  
> login,
> but one may choose a longer period between rotations, this still not
> solving anything though if the user is logged in somewhere. If the  
> user is
> logging in somewhere, though, are the maintaining a static identity?  
> If
> so, why? Would this not be a defeat in and of itself over a long  
> period of
> time, regardless of UA?
>
> Aside from this, would they not link more from the browser than UA?  
> So we
> have two groups if we look at this simply, as a lot of tor users  
> seem to
> like using the popular Windows UA:
>
> Group 1: The real Windows users with the UA, most plugins enabled by
> default, flash, javascript, etc.
>
> Group 2: The tor users with the common Windows UA, most or all plugins
> disabled
>
> So group one is Charlie Brown in the standard t-shirt which never  
> changes,
> and group two is Charlie Brown in the same t-shirt but with a  
> football in
> his hands, the disabled plugins standing out.
>
> So in addition to the TUAC idea (which, despite my naming of it, you
> mentioned has already been suggested, which doesn't surprise me) I  
> propose
> this:
>
> A way to safely spoof (without a negative result to either end) to the
> websites that you have plugins enabled, java, javascript, Flash, and  
> all
> of the rest, but somehow negating the incoming trasmission of said  
> content
> by passing it into some type of virtual shredder, some type of /dev/ 
> null
> approach. In this way Charlie Brown would not be holding the  
> football in
> being fingerprinted so easily.
>
> Thank you for your other useful comments, I have removed them from my
> reply to save space since I have no comments to share on them.
>
> If this is offtopic since it does not directly have to do with tor  
> as you
> have pointed out, I will take the suggestion to others instead.  
> Thanks for
> your kind attention! :)

I don't have much to say to that, except that you stick out as a Tor  
user because your request came through a tor server. The list of tor  
servers is publicly accessible (which is necessary by design) and even  
if you don't spoof anything you're still not the regular Charlie  
Brown. You need to "blend in" with the other Tor users, as you cannot  
blend in with anyone on the planet!
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