Azure Disk Encryption is a new capability for encrypting your Windows and Linux virtual machine disks. Azure Disk Encryption uses the industry-standard BitLocker feature of Windows and the dm-crypt feature of Linux to provide volume encryption for the OS and the data disks.
The solution is integrated with Azure Key Vault to help you control and manage the disk encryption keys and secrets in your key vault subscription. It ensures that all data in the virtual machine disks are encrypted at rest in Azure Storage.