[tor-bugs] #3666 [Tor Browser]: SafeCache key is only 32bit

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#3666: SafeCache key is only 32bit
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 Reporter:  mikeperry    |          Owner:  mikeperry                    
     Type:  defect       |         Status:  new                          
 Priority:  major        |      Milestone:  TorBrowserBundle 2.2.x-stable
Component:  Tor Browser  |        Version:                               
 Keywords:               |         Parent:                               
   Points:               |   Actualpoints:                               
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 We need to extend the key that safecache uses either to a 64bit int, or
 just add an additional string key. 32bits is too small: the birthday
 paradox says that 1 in every 64k domains will collide to the same id,
 allowing identifier sharing.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/3666>
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