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https://issues.apache.org/jira/browse/MAPREDUCE-4552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13579727#comment-13579727
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efan lee commented on MAPREDUCE-4552:
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How to store and protect the key file?
                
> Encryption:  Add support for PGP Encryption
> -------------------------------------------
>
>                 Key: MAPREDUCE-4552
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4552
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: security
>            Reporter: Benoy Antony
>            Assignee: Benoy Antony
>         Attachments: MR_4552_1_1.patch, MR_4552_trunk.patch
>
>
> Provide support for PGP encryption by implementing Encrypter and Decrypter 
> interfaces defined in MAPREDUCE-4450.  This can be used by the cluster to 
> protect the job secrets. This also be used map reduce jobs to encrypt/decrypt 
> data. 
> Add PGPCodec as a CompressionCodec  so that encrypted data can be processed 
> transparently like compressed data . The aliases to the keys can be specified 
> as part of Job. 
> Based on PGPCodec, a number of utilities are provided to encrypt, decrypt the 
> data in cluster.  They include
> 1.    DistributedSplitter – Split an encrypted file into smaller files.
> 2.    DistributedEncrypter – encrypt files in a cluster.
> 3.    DistributedDecrypter – decrypt encrypted files in a cluster.
> 4.    DistributedRecrypter – decrypt an encrypted file and encrypt it with 
> another key.
> Uitlities are added to encrypt/decrypt files in local file system
> 1.    Genkey - Generate an asymmetric key pair (public and private keys) of a 
> specified strength
> 2.    Encrypt - Encrypt a file 
> 3.    Decrypt – Decrypt a file
> Added as a contrib project -  hadoop-crypto.

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