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From "Jerry Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-5207) Support data encryption for Hive tables
Date Wed, 18 Sep 2013 07:06:55 GMT

    [ https://issues.apache.org/jira/browse/HIVE-5207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13770520#comment-13770520
] 

Jerry Chen commented on HIVE-5207:
----------------------------------

HIVE-4227 is specifically for adding column level encryption for ORC files. As we all know,
Hive tables support various other formats such as text file, sequence file, RC file and Avro
file. HIVE-5207 is targeting to address these file formats as a common problem for supporting
encryption.

As to key management, from the user’s perspective one rational approach is one table key
per encrypted table. In this concept, it is natural to associate the key with TblProperties
                
> Support data encryption for Hive tables
> ---------------------------------------
>
>                 Key: HIVE-5207
>                 URL: https://issues.apache.org/jira/browse/HIVE-5207
>             Project: Hive
>          Issue Type: New Feature
>    Affects Versions: 0.12.0
>            Reporter: Jerry Chen
>              Labels: Rhino
>   Original Estimate: 504h
>  Remaining Estimate: 504h
>
> For sensitive and legally protected data such as personal information, it is a common
practice that the data is stored encrypted in the file system. To enable Hive with the ability
to store and query the encrypted data is very crucial for Hive data analysis in enterprise.

>  
> When creating table, user can specify whether a table is an encrypted table or not by
specify a property in TBLPROPERTIES. Once an encrypted table is created, query on the encrypted
table is transparent as long as the corresponding key management facilities are set in the
running environment of query. We can use hadoop crypto provided by HADOOP-9331 for underlying
data encryption and decryption. 
>  
> As to key management, we would support several common key management use cases. First,
the table key (data key) can be stored in the Hive metastore associated with the table in
properties. The table key can be explicit specified or auto generated and will be encrypted
with a master key. There are cases that the data being processed is generated by other applications,
we need to support externally managed or imported table keys. Also, the data generated by
Hive may be consumed by other applications in the system. We need to a tool or command for
exporting the table key to a java keystore for using externally.
>  
> To handle versions of Hadoop that do not have crypto support, we can avoid compilation
problems by segregating crypto API usage into separate files (shims) to be included only if
a flag is defined on the Ant command line (something like –Dcrypto=true).

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