Oracle - How to determine if a table is TDE encrypted

As mentioned in the topic: How to tell if in Oracle a table is encrypted with TDE or not? Couldn't find anything asking Google.

Solution

This information can be obtained from [dba | all | user]_encrypted_columns data dictionary view(s)

administer key management set keystore open identified by password;
administer key management set key identified by password with backup;

-- test table with one encrypted column   
create table tb_encrpt (
  c1 varchar2(10) encrypt
)
tablespace encrypt_tbs;

Display information about encrypted tables' columns

column table_name format a10;
column column_name format a10;
column encryption_alg format a10;

select table_name
     , column_name
     , encryption_alg
  from dba_encrypted_columns

The result:

TABLE_NAME COLUMN_NAM ENCRYPTION
---------- ---------- ----------
TB_ENCRPT  C1         AES 192 bi


1 row selected.

How to tell if in Oracle a table is encrypted with TDE or not?

If a table is not present in the [dba | all | user]_encrypted_columns then it has no encrypted columns.