[tor-bugs] #28804 [Core Tor/Tor]: Add circuit padding to padding-spec.txt and write a doc for researchers

[Tor Bug Tracker & Wiki]

#28804: Add circuit padding to padding-spec.txt and write a doc for researchers
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 Reporter:  asn                                  |          Owner:  (none)
     Type:  defect                               |         Status:  new
 Priority:  High                                 |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  wtf-pad, tor-relay, tor-cell,        |  Actual Points:
  padding, tor-spec, 041-proposed, network-      |
  team-roadmap-2019-Q1Q2                         |
Parent ID:                                       |         Points:  2
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor2
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Comment (by mikeperry):

 Other things to do: I want to stop referring to what we implemented as
 "WTF-PAD" in technical documentation. WTF-PAD was the implementation of
 the system described by the research paper
 http://arxiv.org/pdf/1512.00524. The stuff in Tor now is NOT WTF-PAD. If
 people start writing research papers about how they attacked the new WTF-
 PAD as implemented in Tor, all hell will break loose and nobody will know
 what anybody is talking about anymore.

 We should update the Tor spec/proposal (aka
 https://lists.torproject.org/pipermail/tor-dev/2019-May/013822.html)
 accordingly.

 Additionally, I updated the comments in
 https://github.com/torproject/tor/blob/master/src/core/or/circuitpadding_machines.c#L60
 to make it easier to understand, but these did not get updated in the
 spec. So we should do that too.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28804#comment:11>
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