[tor-bugs] #15621 [Core Tor/Tor]: Kill the pre-version 3 intro protocol code with fire.

[Tor Bug Tracker & Wiki]

#15621: Kill the pre-version 3 intro protocol code with fire.
---------------------------------------+-----------------------------------
 Reporter:  yawning                    |          Owner:  dgoulet
     Type:  enhancement                |         Status:  needs_information
 Priority:  Medium                     |      Milestone:  Tor:
Component:  Core Tor/Tor               |  0.2.9.x-final
 Severity:  Normal                     |        Version:
 Keywords:  tor-hs, TorCoreTeam201604  |     Resolution:
Parent ID:  #6418                      |  Actual Points:
 Reviewer:  asn                        |         Points:  small
                                       |        Sponsor:  SponsorR-can
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Comment (by arma):

 Another linkability attack: somebody runs two onion services, either on
 the same Tor instance or on two machines that are upgraded at once. An
 observant person can notice that these two onion services dropped v2
 support at the same time.

 David and I discussed, and we think the middle ground patch will be more
 work, and we should just hold off on merging this until we do the 224
 roll-out too. (It's a small patch, and if we break it we can fix it, and
 if we don't break it then win.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15621#comment:23>
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