Re: [tor-bugs] #9166 [Tor]: Write a UTP-based channel implementation

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#9166: Write a UTP-based channel implementation
---------------------------+------------------------------------------------
 Reporter:  nickm          |          Owner:                  
     Type:  defect         |         Status:  new             
 Priority:  normal         |      Milestone:  Tor: unspecified
Component:  Tor            |        Version:                  
 Keywords:  tor-relay utp  |         Parent:  #9165           
   Points:                 |   Actualpoints:                  
---------------------------+------------------------------------------------

Comment(by yawning):

 I've also linked this on #tor-dev, but eventually libutp will need to be
 changed.

 Security analysis of the micro transport protocol with a misbehaving
 receiver
 http://openaccess.city.ac.uk/1967/1/cyberc12%2Dflorian%2Dpaper%20pdf.pdf

 Of particular note is:
 {{{
 Therefore a good countermeasure against the delay attack yields to a
 complete redesign of the LEDBAT congestion control.  That is why we
 don not[sic] propose a countermeasure against this attack and point
 here to further research.
 }}}

 LEDBAT by design will yield to competing traffic anyway, so it's not the
 right congestion control algorithm for Tor.  Implementing Reno+SACK
 shouldn't be too difficult as a starting point (a more modern algorithm
 like CUBIC could also be used).

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9166#comment:16>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
_______________________________________________
tor-bugs mailing list
tor-bugs@xxxxxxxxxxxxxxxxxxxx
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs