Autonomous Database stores all data with inbuilt security. Only authenticated users and applications can access the data when they connect to the database.

• Security Features Overview
  Describes some of the robust security features that Autonomous Database provides.
• Security and Authentication in Oracle Autonomous Database
  Oracle Autonomous Database stores all data in encrypted format in the database. Only authenticated users and applications can access the data when they connect to the database.
• Security Testing Policies on Autonomous Database
  Autonomous Database is subject to the Oracle Cloud Security Testing policy which describes when and how you may conduct certain types of security testing of Oracle Cloud Infrastructure services, including vulnerability and penetration tests, as well as tests involving data scraping tools.
• Manage Encryption Keys on Autonomous Database
  Describes how to use customer-managed encryption keys with Autonomous Database, and if you are using customer-managed encryption keys, shows how to rotate the keys, switch to Oracle-managed encryption keys, or view the encryption key history.
• Configure Network Access with Access Control Rules (ACLs) and Private Endpoints
  Provides details on how to configure network access with access control rules or using a private endpoint and describes the secure client connection options. Also describes how to enable support for TLS connections (require mutual TLS only or allow both mutual TLS and TLS authentication).
• Audit Autonomous Database
  Autonomous Database provides auditing that allows you to monitor Oracle database activities.
• Rotate Wallets for Autonomous Database
  Wallet rotation lets you invalidate existing client certification keys for a database instance or for all Autonomous Database instances that a cloud account owns in a region.
• Use Oracle Database Vault with Autonomous Database
  Oracle Database Vault implements powerful security controls for your database. These unique security controls restrict access to application data by privileged database users, reducing the risk of insider and outside threats and addressing common compliance requirements.
• IAM Policies for Autonomous Database
  Provides information on IAM policies required for API operations on Autonomous Database.
• Use Oracle Data Safe with Autonomous Database
  Provides information on using Oracle Data Safe on Autonomous Database.
• Break Glass Access for SaaS on Autonomous Database
  Autonomous Database supports break glass access for SaaS providers. Break glass access allows a SaaS operations team, when explicitly authorized by a SaaS customer, to access a customer's database to perform critical or emergency operations.
• Encrypt Data While Exporting or Decrypt Data While Importing
  For greater security you can encrypt data that you export to Object Storage. When data on Object Storage is encrypted you can decrypt the data you import or when you use the data in an external table.
• Manage Oracle Cloud Operator Access
  Describes how to grant temporary access to your database for an Oracle Cloud Operator.