Thomas D'Silva commented on HBASE-19842:
I can work on this JIRA if no one else is currently working on it.
> Cell ACLs v2
> Key: HBASE-19842
> URL: https://issues.apache.org/jira/browse/HBASE-19842
> Project: HBase
> Issue Type: New Feature
> Components: security
> Reporter: Andrew Purtell
> Priority: Major
> Per cell ACLs as currently implemented (HBASE-7662) embed the serialized ACL
> in a tag stored with each cell. This was done for performance. This has some
> drawbacks, most significantly unnecessary duplication and to grant or revoke
> this requires a rewrite of every affected cell. We could implement them in a
> space efficient (and management efficient way) at the cost of some
> performance like so:
> First, allow storage of cell level ACLs in the ACL table. Rowkey could be
> hash of serialized ACL format. Just have to avoid using rowkeys that
> associate the ACL with a cf, or table, or namespace... And handle entries in
> the ACL tables which don't conform to today's keying strategy.
> Then provide the option for storing the rowkey of an entry in the ACL table
> in the cell ACL tag instead of the complete serialization.
> The advantages would be reduction of unnecessary duplication, and, like ACLs
> at other granularities, a GRANT or REVOKE which updates the ACL table will
> update access control rules for all affected cells. The disadvantage would be
> in order to process the reference to the ACL for each cell with an ACL
> reference in a tag we will need to look up the ACL in the ACL table.
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