Which service allows for transparent data encryption in Azure SQL Database?

Transparent Data Encryption (TDE) is a feature in Azure SQL Database that provides encryption of data at rest. It automatically encrypts the database files and the associated backup files, ensuring that data is stored securely without the need for manual encryption processes. This service is designed to safeguard sensitive data from unauthorized access while allowing the database to remain fully functional and accessible to applications.

By using TDE, organizations can protect their data without altering how applications interact with the database. This is particularly important for compliance and regulatory requirements, as it effectively shields the data from physical theft or loss scenarios. Since TDE operates transparently, the end users or applications do not require any changes in order to take advantage of this security measure.

The other options are different services that do not specifically provide transparent data encryption. Data Encryption as a Service (DEaaS) is a concept but does not represent a specific Azure service for SQL Database. Advanced Threat Protection (ATP) is focused on detecting and responding to potential security threats rather than encryption of data. The Key Vault Service is aimed at securely storing and managing cryptographic keys, but it does not directly provide transparent data encryption for Azure SQL Database itself.