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[tor-bugs] #8140 [Tor]: Review and update rend-spec.txt

#8140: Review and update rend-spec.txt
-------------------------+--------------------------------------------------
 Reporter:  runa         |          Owner:  runa
     Type:  enhancement  |         Status:  new 
 Priority:  normal       |      Milestone:      
Component:  Tor          |        Version:      
 Keywords:               |         Parent:      
   Points:               |   Actualpoints:      
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 I wanted to figure out how a client knows which relays are hosting the
 descriptor for a specific hidden service. I started reading through rend-
 spec.txt and noticed it mentions both a fixed set (v0) and a changing set
 (v2) of HSDirs. I believe we dropped the fixed set of HSdirs a long time
 ago, so rend-spec.txt needs an update.

 Here is what asn and arma told me on IRC:

 The current scheme (v2) means that there are 6 HSDirs for each .onion. The
 client visiting the hidden service computes which relays are hosting the
 hidden service's descriptor, in the same way that the Tor publishing the
 hidden service descriptor computes it. It is a function of timestamp and
 hash-of-public key (aka .onion address).

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8140>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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