[tor-bugs] #18638 [Tor]: Write a proposal for PK handshake that uses more client resources than server.

Mon Mar 28 02:13:14 UTC 2016

#18638: Write a proposal for PK handshake that uses more client resources than
server.
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 Reporter:  nickm   |          Owner:
     Type:  task    |         Status:  new
 Priority:  Medium  |      Milestone:  Tor: 0.2.9.x-final
Component:  Tor     |        Version:
 Severity:  Normal  |     Resolution:
 Keywords:  dos     |  Actual Points:
Parent ID:  #17280  |         Points:  medium/large
 Reviewer:          |        Sponsor:  SponsorU-can
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Comment (by nickm):

 A good start!  (No, let's say we don't care about TAP.)

 There is still a DoS force multiplier in this design, though, to the
 extent that computing Xb is slower for the server than sending a fake X is
 for the client.

 I wonder if we can raise the cost somehow.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18638#comment:3>
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