On Mon, Jan 20, 2014 at 08:30:12AM -0500, Ian Goldberg wrote: > On Sat, Jan 18, 2014 at 01:40:43AM +0000, Matthew Finkel wrote: > > obfs3 is supposed to be fairly difficult to detect because entropy > > estimation is seemingly more difficult than typically assumed, > > and thus far from what has been seen in practice this seems to be true. > > Wouldn't the way to detect obfs3 be to look at packet sizes, not > contents? obfs3 doesn't hide those at all, right?
Yes, obfs3 doesn't hide packet sizes. As a result, Tor over obfs3 results in packets which are multiples of Tor's 512-byte cells (excluding TLS headers). Cheers, Philipp _______________________________________________ tor-dev mailing list [email protected] https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
