[tor-bugs] #20262 [Core Tor/Tor]: Onion services startup time always gets revealed

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#20262: Onion services startup time always gets revealed
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 Reporter:  twim             |          Owner:
     Type:  defect           |         Status:  needs_review
 Priority:  Medium           |      Milestone:  Tor: 0.3.0.x-final
Component:  Core Tor/Tor     |        Version:
 Severity:  Major            |     Resolution:
 Keywords:  tor-hs research  |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:                   |        Sponsor:  SponsorR-can
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Comment (by twim):

 I think that because of #20082 and that startuptime should be revealed by
 default (that's what users expect), it's reasonable to introduce
 `ObfuscateOnionServiceStartupTime` instead that defaults to `0`. Thus it
 would not conflict with Single Onions and SOS operators can obfuscate
 startup time also (maybe pointless).
 If implemented, it should be built on top of #20082 (without lower bound
 for initial delay) just with `crypto_rand_int(2*rendpostperiod)` delay
 instead of immediate first upload.

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Ticket URL: <https://troodi.torproject.org/projects/tor/ticket/20262#comment:9>
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