[tor-bugs] #7830 [Core Tor/Tor]: UDP over Tor

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#7830: UDP over Tor
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 Reporter:  proper                    |          Owner:
     Type:  enhancement               |         Status:  new
 Priority:  Medium                    |      Milestone:  Tor: very long
Component:  Core Tor/Tor              |  term
 Severity:  Normal                    |        Version:
 Keywords:  tor-relay needs-proposal  |     Resolution:
Parent ID:                            |  Actual Points:
 Reviewer:                            |         Points:
                                      |        Sponsor:
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Comment (by arthuredelstein):

 Replying to [comment:2 rransom]:
 > This is unlikely to be possible.
 [snip]
 >  * Transporting UDP-based protocols cannot provide a performance
 improvement unless relays are permitted to reorder and/or drop cells.
 This would make end-to-end tagging attacks much easier (they would no
 longer be limited to relays), and would be incompatible with Tor's current
 relay crypto and the currently proposed new relay crypto protocols.

 For me, the most important argument for transmitting UDP over Tor is that
 it would support existing UDP-based protocols and applications. I think
 that would be useful even without a performance improvement. Would it be
 safe (as safe as Tor's existing support of TCP streams) to transmit UDP
 datagrams between guards and exit nodes if the reordering or dropping of
 cells were not permitted?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/7830#comment:5>
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