Data sent to the database is encrypted by Oracle, and
data requested from the database is decrypted. No additional code is required in an
application, which means that youcan encrypt existing data without changing any of
your SQL access statements.
Oracle Database 11g allows youto encrypt entire tablespaces (described in
Chapter 4) with Transparent Data Encryption, and this feature should reduce management
overhead for this feature.
Secure Backup
The security features described in previous sections give you the tools you need to
keep the data in your Oracle database secure. But what about when the data leaves
your Oracle database??”for example, when you perform the necessary maintenance
step of backing up the data?
Recent events have shown that lost backup tapes are a reality, and backup tapes can
be stolen. Secure Backup, released between Oracle Database 10g Release 2 and Oracle
Database 11g, automatically encrypts your backup data. The data can be
decrypted only by the source database, so even if a backup tape is lost or stolen, the
recipient will not be able to see your data.
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