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: https://trac.torproject.org/projects/tor/ticket/4666 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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