Which service is used by Azure Disk Encryption to manage encryption keys?

Azure Disk Encryption uses Azure Key Vault to manage encryption keys, making this the correct choice. Azure Key Vault serves as a secure repository for keys and secrets, allowing organizations to manage encryption for their virtual machine disks effectively. By integrating with Azure Disk Encryption, it provides a way to protect the encryption keys used to encrypt virtual hard disks (VHDs) and ensures that these keys are stored securely and accessed only by authorized applications and users.

Using Azure Key Vault enhances security because it supports features like role-based access control (RBAC), auditing, and the ability to set policies around key usage. This ensures an organization can maintain compliance and regulatory standards while securing sensitive data on Azure.

In contrast, Azure Active Directory primarily focuses on identity and access management rather than key management. Azure Storage Accounts are designed for data storage purposes, and while they can store blobs, files, and other data, they do not specifically handle cryptographic keys. Lastly, Azure Security Center is a unified infrastructure security management system that provides advanced threat protection, but it does not directly relate to the management of encryption keys.