Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/8803#discussion_r39811058
--- Diff: docs/security.md ---
@@ -47,6 +48,17 @@ follows:
* Import all exported public keys into a single trust-store
* Distribute the trust-store over the nodes
+### Configuring SASL Encryption
+
+To enable SASL encryption for an application, set
`spark.authenticate.enableSaslEncryption` to
--- End diff --
That's explained above, right? It's used to encrypt block manager traffic.
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