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Tuesday, May 13, 2008

11g New Features - Tablespace Encryption

You might have heard about Transparent Data Encryption or TDE in 10g; In Oracle 11g, it has been taken to a next level with "tablespace encryption". So TDE which started at column level is available at tablespace level.

How does it help?
Now instead of encrypting the columns one-by-one in a table or for a set of tables, you can simply put all tables which need to be encrypted in a single tablespace and encrypt it.

How to do it?
- Create and open the wallet
- Create tablespace with encryption property

CREATE TABLESPACE encrypt_tbsp
DATAFILE '/
oradata/encrypt_tbsp01.dbf'
SIZE 100M

ENCRYPTION

DEFAULT STORAGE(ENCRYPT);


- Create tables in the encrypted tablespace

How to find if tablespace is encrypted or not?
- A new column "ENCRYPTED" has been added to DBA_TABLESPACES which will indicate if the tablespace is encrypted or not.
- Query a new dynamic performance view V$ENCRYPTED_TABLESPACES for encrypted tablespaces.

Do I need to do anything special to access data from a encrypted tablespace?
Not really, you continue to access data as usual BUT the wallet must be open. No modification whatsoever is required for the code/SQL to access data from encrypted tablespace.

What is supported and not supported with encrypted tablespaces?
Supported
- Move table back and forth between encrypted tablespace and non-encrypted tablespace
- Datapump is supported to export/import encrypted content/tablespaces

- Transportable tablespace is supported using datapump

Not Supported
- Tablespace encryption cannot be used for SYSTEM, SYSAUX, UNDO and TEMP tablespaces
- Existing tablespace cannot be encrypted

- Traditional export/import utilities for encrypted content


Though I have not been able to create an encrypted tablespace but still wanted to share this information. I will try to post my learnings from the exercise later. Hope this is useful. NJoy! encrypting and do let me know if I have missed out any key messaging herein.

References:-
Oracle® Database Advanced Security Administrator's Guide 11g Release 1 (11.1) Part Number B28530-02