Final answer:
Transparent Data Encryption (TDE) is the service that encrypts both Azure SQL Database and Azure Data Warehouse. It provides encryption of the database, backups, and logs at rest and is managed with a database encryption key.
Step-by-step explanation:
The service that encrypts Azure SQL Database and Azure Data Warehouse is called Transparent Data Encryption (TDE). TDE helps protect Azure SQL databases against the threat of malicious activity by performing real-time encryption and decryption of the database, associated backups, and transaction log files at rest without requiring changes to the application. This encryption uses a symmetric key called the database encryption key (DEK), which is protected by a built-in server certificate. Azure users have the option to manage TDE with customer-managed keys for greater control over the encryption keys. It's important for businesses and professionals to understand and implement TDE to ensure the security of their data within Azure services.