Oracle Database 23ai with Transparent Database Encryption (TDE) introduces support for tablespace encryption using AES-XTS, a de-facto industry standard for protecting data at rest.

In conjunction with Oracle Database 23ai, Oracle Exadata System Software release 24.1.0 transparently enables Exadata Smart Scan on data in tablespaces encrypted using AES-XTS. AES-XTS provides improved security and better performance, especially on Exadata where TDE can take advantage of parallel processing and specialized instructions built into processor hardware.