[tor-bugs] #4744 [Tor Bridge]: GFW probes based on Tor's SSL cipher list

Tor Bug Tracker & Wiki torproject-admin at torproject.org
Wed Feb 8 14:03:29 UTC 2012


#4744: GFW probes based on Tor's SSL cipher list
--------------------------------+-------------------------------------------
 Reporter:  asn                 |          Owner:  nickm             
     Type:  defect              |         Status:  accepted          
 Priority:  major               |      Milestone:  Tor: 0.2.3.x-final
Component:  Tor Bridge          |        Version:                    
 Keywords:  tls fingerprinting  |         Parent:  #4185             
   Points:                      |   Actualpoints:                    
--------------------------------+-------------------------------------------

Comment(by nickm):

 Do we have a cipher list from recent IE?
 http://blogs.technet.com/b/steriley/archive/2007/11/06/changing-the-ssl-
 cipher-order-in-internet-explorer-7-on-windows-vista.aspx purports to have
 one, but it doesn't look authoritative.

 If that list is accurate, then unfortunately,it doesn't include the one we
 actually want, TLS_DHE_RSA_WITH_AES_128_SHA.  (It doesn't have any DHE+RSA
 ciphers, as near as I can tell.)  It'd be nice to support something
 properly fast, like TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA_P256, but that'd
 require server upgrading.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4744#comment:10>
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