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https://issues.apache.org/jira/browse/HADOOP-10967?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14098198#comment-14098198
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Alejandro Abdelnur commented on HADOOP-10967:
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Nice, +1.
> Improve DefaultCryptoExtension#generateEncryptedKey performance
> ----------------------------------------------------------------
>
> Key: HADOOP-10967
> URL: https://issues.apache.org/jira/browse/HADOOP-10967
> Project: Hadoop Common
> Issue Type: Improvement
> Components: security
> Affects Versions: 2.6.0
> Reporter: Yi Liu
> Assignee: Yi Liu
> Attachments: HADOOP-10967.001.patch
>
>
> This JIRA is to improve generateEncryptedKey performance:
> *1.* SecureRandom#generateSeed is very slow, we should use
> SecureRandom#nextBytes to generate the {{IV}} which is much faster.
> *2.* Define SecureRandom as threadlocal object which can improve the
> performance a bit.
> *3.* Use {{new SecureRandom()}} instead of SHA1PRNG, the former has better
> entropy.
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