Oracle provides encryption functionality as part of the Oracle Database Advanced Security Option (ASO). Oracle's ASO offering includes Transparent Data Encryption (TDE). Oracle Data Masking and Database Vault are other options available from Oracle that can be used to address other security requirements. Oracle Encryption (TDE) was first introduced in Oracle 10g Database Release 2 (10gR2) to simplify the encryption of data within data files, preventing access to it from the operating system. Oracle 10gR2 provided column encryption. Oracle 11gR1 and R2 added tablespace encryption to the existing column encryption.
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