[tor-bugs] #15991 [Tor]: Option to skip authorization verification in INTRODUCE2 cell

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#15991: Option to skip authorization verification in INTRODUCE2 cell
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     Reporter:  donncha      |      Owner:
         Type:  enhancement  |     Status:  new
     Priority:  normal       |  Milestone:
    Component:  Tor          |    Version:
   Resolution:               |   Keywords:  hs
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by donncha):

 Thanks for the feedback. I'm not really aware of the risks arising from
 publicly publishing a HS instance's IPs. It could allow an attacker
 running HSDirs to determine that the HS is using (somethingl ike)
 OnionBalance, if they see that the same IP is incorporated in multiple
 descriptors.

 Is it a big problem is an attacker can discover that a HS is using
 OnionBalance? Looking at the data in #15513, I think it might be difficult
 to select IPs from multiple instances in a way that wouldn't be
 distinguishable from the behaviour of a standard HS.

 At the moment, I'm planning to implement #3521, it should allow the
 management service to more reliably fetch up-to-date descriptors from the
 HS instances when the IPs change. It should also avoid the need for this
 ticket.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15991#comment:2>
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