On Wed, Jan 22, 2014 at 02:17:34AM +0000, Matthew Finkel wrote: > On Mon, Jan 20, 2014 at 05:21:26PM +0100, Philipp Winter wrote: > > 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). > > True. I also assume that the complete absense of a plaintext header is > a potential fingerprint, as well.
Sorry, that should have said handshake instead of header. _______________________________________________ tor-dev mailing list [email protected] https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
