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https://issues.apache.org/jira/browse/SPARK-12333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15652280#comment-15652280
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Marcelo Vanzin commented on SPARK-12333:
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{{blockManager.getDiskWriter}} uses the block manager's serializer manager,
which does encryption.
> Support shuffle spill encryption in Spark
> -----------------------------------------
>
> Key: SPARK-12333
> URL: https://issues.apache.org/jira/browse/SPARK-12333
> Project: Spark
> Issue Type: New Feature
> Components: Shuffle
> Reporter: Ferdinand Xu
>
> Like shuffle file encryption in SPARK-5682, spills data should also be
> encrypted.
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