Encrypted tablespaces primarily protect your data from unauthorized access by means
other than through the database. For example, when encrypted tablespaces are written
to backup media for travel from one Oracle database to another or for travel to an
off-site facility for storage, they remain encrypted. Also, encrypted tablespaces protect
data from users who try to circumvent the security features of the database and access
database files directly through the operating system file system.
You can encrypt any permanent tablespace to protect sensitive data. When you
encrypt a tablespace, all tablespace blocks are encrypted. All segment types are
supported for encryption, including tables, clusters, indexes, LOBs, table and index
partitions, and so on. Tablespace encryption is completely transparent to your
applications, so no application modification is necessary.
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