he data is compromised. Of course, you can change the key and regenerate 
the test instances – but stored or saved copies of the data are immediately available 
under the old password. 
 
Encryption also destroys the formatting and look and feel of the data. Encrypted data 
rarely looks meaningful, in fact, it usually looks like binary data. This sometimes 
leads to NLS character set issues when manipulating encrypted varchar fields. Certain 
types of encryption impose constraints on the data format as well