[tor-bugs] #6057 [TorBirdy]: Enumerate difficulties with obfuscating useragent from mailinglists

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#6057: Enumerate difficulties with obfuscating useragent from mailinglists
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 Reporter:  proper    |          Owner:  ioerror
     Type:  defect    |         Status:  new    
 Priority:  critical  |      Milestone:         
Component:  TorBirdy  |        Version:         
 Keywords:            |         Parent:         
   Points:            |   Actualpoints:         
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Comment(by tagnaq):

 Hi proper,

 I think we have different goals and threat models.
 What do you aim for?

 We do not aim to look like an ordinary Thunderbird.
 We want to have all TorBirdy users in one anonymity set*. We aim to modify
 multiple headers (UA, message-id, date, enigmail header, ... ) to remove
 leaks / anonymity set reductions. We do not assume that our MTA is
 removing our IP address. In fact we do not trust our MTA (or mailing list
 provider).

 *) A TorBirdy user/a user having certain pref settings is easily
 identified by inspecting the modified headers and Tor exit source IP
 address.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/6057#comment:3>
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The Tor Project: anonymity online