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

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#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):

 One more thing to cover in the research doc: We should explain how we will
 accept and deploy changes to the padding machine featureset itself (one
 potentially useful change is for all state transitions have a probability
 associated with them, to explicitly support HMM representations).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28804#comment:12>
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