Re: [tor-bugs] #33712 [Core Tor/Tor]: Design a PoW/credential scheme for HS DoS defence

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#33712: Design a PoW/credential scheme for HS DoS defence
-------------------------------------------------+-------------------------
 Reporter:  asn                                  |          Owner:  (none)
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-hs, tor-dos, network-team-       |  Actual Points:
  roadmap-2020Q1, network-health, research       |
Parent ID:  #31223                               |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by mikeperry):

 TL;DR of above is that there are multiple classes of protocol changes, and
 I think we should decide our high-level preference for what order we want
 to attempt them.

 Here's a strawman ordering of the combination of (degree of network
 upgrade required, external infra required) pairs:

 1. No network upgrade required; no external infra deployment (ie: client
 and service only)
 2. Backportable network upgrade required; no external infra deployment.
 3. No network upgrade required; external infra deployment **is required**.
 4. Backportable network upgrade required, external infra deployment **is
 required**.
 5. Non-backportable IP upgrade required; no external infra deployment.
 6. Non-backportable IP upgrade required; external infra deployment **is
 required**
 7. Non-backportable **full network upgrade**; no external infra
 deployment.
 8. Non-backportable **full network upgrade**; external infra deployment
 **is required**

 Important questions to answer:
 * Does this ordering sound right in terms of what we should prefer/attempt
 to build first?
 * Does anyone want to propose a different ordering?
 * What sorts of changes are backportable for this problem?

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33712#comment:4>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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