[jira] [Comment Edited] (HDFS-11357) Secure Delete

["Andrew Purtell (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-11357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15850920#comment-15850920 ] 

Andrew Purtell edited comment on HDFS-11357 at 2/3/17 2:10 AM:
---------------------------------------------------------------

[~jpallas] As stated above this isn't useful for COW filesystems or media, and cryptographic erase is the ideal (IMHO).
Really, it's fine with me if you lot decide this isn't worth it given the limitations. Thought I'd put it out there anyway


was (Author: apurtell):
[~jpallas] As stated above this isn't useful for COW filesystems or media, and cryptographic erase is the idea (IMHO).
Really, it's fine with me if you lot decide this isn't worth it given the limitations. Thought I'd put it out there anyway

> Secure Delete
> -------------
>
>                 Key: HDFS-11357
>                 URL: https://issues.apache.org/jira/browse/HDFS-11357
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>            Priority: Minor
>         Attachments: 0001-HDFS-secure-delete.patch, HDFS-11357.patch
>
>
> Occasionally for compliance or other legal/process reasons it is necessary to attest that data has been deleted in such a way that it cannot be retrieved even through low level forensics (for some reasonable definition of this that typically excludes the resources a state actor can bring to data recovery). HDFS at-rest encryption offers one way to achieve this, if the data keying strategy is highly granular. One simply "forgets" a key corresponding to a given set of files and the data becomes irretrievable. However if HDFS at-rest encryption is not enabled or a fine grained keying strategy is not possible, another simple strategy can be employed. 
> The objective is to ensure once a block is deleted no trace of the data within the block exists on disk in unallocated regions, for all blocks, providing assurance deleted data cannot be recovered at any time through reasonable effort even with low level access. 



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