[tor-bugs] #10598 [Obfsproxy]: Merge ScrambleSuit v2014.01.a.

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#10598: Merge ScrambleSuit v2014.01.a.
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     Reporter:  phw          |      Owner:  asn
         Type:  enhancement  |     Status:  new
     Priority:  normal       |  Milestone:
    Component:  Obfsproxy    |    Version:
   Resolution:               |   Keywords:  pt, obfsproxy, scramblesuit
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by phw):

 Replying to [comment:6 asn]:
 > Replying to [comment:5 phw]:
 > > Another thing which just came to mind: Do we want to use inter-arrival
 time obfuscation or not?  Right now, it is activated (see
 `USE_IAT_OBFUSCATION` in const.py).  While throughput it still reasonable,
 we can maximise it by completely disabling inter-arrival time obfuscation.
 That might not be a bad choice as timing-based attacks seem to be an
 exotic threat at this point.  Activating it at a later point in time is a
 matter of simply setting the above variable to `True`.
 >
 > I guess keeping it disabled for now makes sense.

 Agreed.

 > Maybe we should add an optional CLI/managed-mode switch to scramblesuit
 that enables it if it's needed? So that clients can enable it dynamically
 if it's needed by editing their torrc.

 Hmm, I'm not quite convinced that we should expose these internals to the
 user.  If it ever becomes necessary, we can just update our bundles with
 the option enabled.

 > Still looking forward to your Windows testing :3

 I just got around to testing it on a 64-bit Windows 7.  It seems to work.
 I tested it using Python 2.7 in external mode (is it reasonable to infer
 that it will also work in managed mode?).  I also noticed that we now need
 the module `pyyaml` which I added to `setup.py`. I also updated
 `ChangeLog`.

 I pushed a new branch:
 https://gitweb.torproject.org/user/phw/obfsproxy.git/shortlog/refs/heads/scramblesuit_integration-3

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10598#comment:7>
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