[tor-talk] tor-blocking sites

[Mike Perry]

Thus spake Andrew Lewman (andrew at torproject.org):

> On Wed, 08 Feb 2012 23:13:44 +0100
> Moritz Bartl <moritz at torservers.net> wrote:
> > I believe it's more important to make it easy for people to detect Tor
> > and deal with it differently in the first place. The second step then
> > is to provide useful alternatives to blocking.
> 
> Perhaps someone wants to implement nymble,
> http://cgi.soic.indiana.edu/~kapadia/nymble/index.php

I admit I haven't read all of the various iterations of the Nymble
literature, but every one I've looked at so far seems to start with
"Assume you have some expensive, scare resource. Let's say IP
address"... 

Even if they blind it properly with some clever distributed trust scheme
that requires multiple colluding parties to divulge the entire Tor
userbase IP list, it seems to me that IPv4 addresses aren't really
scarce when you're talking about one-time use only to obtain a Nym that
can be used for a while.

Therefore, my current thinking in
https://trac.torproject.org/projects/tor/ticket/4666 is that if we can
authenticate computation as the scarce resource, why do we even need a
full Nymble server? At best it *might* ease implementation for account
banning, but it probably would just add another point of failure and
useless complexity.

Am I wrong?


-- 
Mike Perry
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