Part III describes how to control access to data.

• Using Application Contexts to Retrieve User Information
  An application context stores user identification that can enable or prevent a user from accessing data in the database.
• Using Oracle Virtual Private Database to Control Data Access
  Oracle Virtual Private Database (VPD) enables you to filter users who access data.
• Using Transparent Sensitive Data Protection
  Transparent sensitive data protection enables you to find all table columns in a database that hold sensitive data.
• Encryption of Sensitive Credential Data in the Data Dictionary
  You can encrypt sensitive credential information, such as passwords that are stored in the data dictionary.
• Manually Encrypting Data
  You can use the DBMS_CRYPTO PL/SQL package to manually encrypt data.