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Re: [tor-talk] tor-blocking sites

Thus spake Roger Dingledine (arma@xxxxxxx):

> On Mon, Feb 06, 2012 at 07:24:31PM +0000, Mr Dash Four wrote:
> > Initially, there was a small number of these in the wild, but now it
> > is widely spread - google is the main offender, but youtube (which
> > is, as we all know, google-owned) and now, wait for it, scroogle.org
> > (a site I use a lot) is also at it!
> Google doesn't specifically single out exit relays. Google pops up a
> captcha when a given IP address has asked it too many questions recently.
> It's a defense mechanism against crawlers from, say, Bing who are trying
> to steal their precious secret sauce.
> https://www.torproject.org/docs/faq#GoogleCaptcha

One of my goals is to provide an alternative to captchas and IP bans in
the form of computational proof of work:

If anyone has any experience with distributed computing projects that
could meet our requirements, I'd love to hear about it.

Mike Perry

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