Chris Whittleston transcribed 5.0K bytes:
I'm right in thinking that running scramblesuit is not going to do anything for a middle relay correct?
Correct.
Pluggable Transports are (normally) used for hiding that one is speaking the Tor protocol (also they could be used to disguise any protocol). [0] A middle relay, or any normal non-bridge relay, is listed in the consensus, meaning that anyone who looks at the consensus already knows you're speaking Tor.
All of that said, scramblesuit and obfs4 both have some interesting protections against traffic fingerprinting via timing correlations and packet size distributions, meaning that (if there were a way to do this) relays could use PTs between them to protect against some correlations. Doing this would be super weird. No one has done yet, to my knowledge, a security analysis of how running PTs in between normal relays would change things. That analysis would be really interesting.
[0]: See https://trac.torproject.org/projects/tor/wiki/doc/AChildsGardenOfPluggableTr... for visual explanation of how some of the different PTs change your traffic.