[tor-relays] Combined relay and hidden service, good idea or not?

Roger Dingledine arma at mit.edu
Mon Jan 8 23:08:49 UTC 2018

On Mon, Jan 08, 2018 at 03:59:25PM -0700, Dave Warren wrote:
>  Even if Tor didn't supply any relay
> statistics, a curious and enterprising individual could "explore" by seeing
> what happens to a particular onion when one launches a DoS attack against an
> external IP that one believes might be connected to the .onion service.

Yep. If you want to go a step further, check out this paper:
where they investigate inducing congestion on a target IP address
to learn *what web page it's loading*.

Turns out the attack is only effective in certain situations, but
the fact that it's worth taking seriously at all is bad news for
the Internet as a whole.


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