Yi Liu created HADOOP-10967:
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Summary: 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
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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