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 Transact-SQL (2005)
 Query speed problem after encryption
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lionofdezert
Aged Yak Warrior

Pakistan
885 Posts

Posted - 01/30/2009 :  07:05:46  Show Profile  Visit lionofdezert's Homepage  Send lionofdezert a Yahoo! Message  Reply with Quote
I applied encryption (Encryption By Key)to secur my data, in almost all of my table, but on selected columns in each table.
BUT
my simple select query even become 700% slow.

defenitly when i select records i need to decrypt all the encrypted data.

How can i improve my query performance.

* All the indexes are carefully applied and statisics are updated

SwePeso
Patron Saint of Lost Yaks

Sweden
30421 Posts

Posted - 01/30/2009 :  07:24:25  Show Profile  Visit SwePeso's Homepage  Reply with Quote
You can't use indexes when searching on encrypted columns.



E 12°55'05.63"
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Lumbago
Norsk Yak Master

Norway
3271 Posts

Posted - 01/30/2009 :  07:34:24  Show Profile  Reply with Quote
Encrypting data in a database is not such a good idea for exactly this reason. The only stuff I encrypt in the databases I work with are credit card numbers and passwords.

- Lumbago
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