liusheng created HDFS-15098:
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             Summary: Add SM4 encryption method for HDFS
                 Key: HDFS-15098
                 URL: https://issues.apache.org/jira/browse/HDFS-15098
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: liusheng


SM4 (formerly SMS4)is a block cipher used in the Chinese National Standard for 
Wireless LAN WAPI (Wired Authentication and Privacy Infrastructure).
SM4 was a cipher proposed to for the IEEE 802.11i standard, but has so far been 
rejected by ISO. One of the reasons for the rejection has been opposition to 
the WAPI fast-track proposal by the IEEE. please see:

[https://en.wikipedia.org/wiki/SM4_(cipher)]



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