Re: [PR] [SPARK-47318][Security] Adds HKDF round to AuthEngine key derivation to follow standard KEX practices [spark]

["sweisdb (via GitHub)" <gi...@apache.org>]

sweisdb commented on PR #45425:
URL: https://github.com/apache/spark/pull/45425#issuecomment-1997843099

   I've updated the overall Security doc to indicate that TLS is preferred to using the legacy RPC encryption. I also updated the AuthEngine README to talk about incompatibility.
   
   I retroactively made up v1.0 and v1.1 of the key exchange protocol to talk about this. It would probably be more understandable to talk about Spark versions. Should we talk about 4.0 in the context of this change and amend the docs if and when it's backported?


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