The encrypted data is then uploaded to Azure Storage. You can manage it locally or store it in Key Vault. The CEK is encrypted using a Key Encryption Key (KEK), which can be either a symmetric key or an asymmetric key pair. When you use client-side encryption with Key Vault, your data is encrypted using a one-time symmetric Content Encryption Key (CEK) that is generated by the Azure Storage client SDK. NET NuGet package, see Windows Azure Storage 8.3.0. To learn more about and download the Azure Storage Client Library for. NET NuGet package to encrypt data within your client applications prior to uploading it to your Azure storage. You can use the Azure Storage Client Library for. You can perform client-side encryption of Azure blobs in various ways. AES handles encryption, decryption, and key management transparently. Storage Service Encryption uses 256-bit Advanced Encryption Standard (AES) encryption, which is one of the strongest block ciphers available. The process is completely transparent to users. Azure Storage Service Encryptionĭata at rest in Azure Blob storage and Azure file shares can be encrypted in both server-side and client-side scenarios.Īzure Storage Service Encryption (SSE) can automatically encrypt data before it is stored, and it automatically decrypts the data when you retrieve it. By using the Azure Backup service, you can back up and restore encrypted virtual machines (VMs) that use Key Encryption Key (KEK) configuration. You can protect your managed disks by using Azure Disk Encryption for Linux VMs, which uses DM-Crypt, or Azure Disk Encryption for Windows VMs, which uses Windows BitLocker, to protect both operating system disks and data disks with full volume encryption.Įncryption keys and secrets are safeguarded in your Azure Key Vault subscription. However, configuration is complex, and most Azure services don’t support this model. This characteristic is called Host Your Own Key (HYOK). Service-managed keys in customer-controlled hardware: Enables you to manage keys in your proprietary repository, outside of Microsoft control. Service-managed keys: Provides a combination of control and convenience with low overhead.Ĭustomer-managed keys: Gives you control over the keys, including Bring Your Own Keys (BYOK) support, or allows you to generate new ones. The three server-side encryption models offer different key management characteristics, which you can choose according to your requirements: You maintain complete control of the keys. With client-side encryption, cloud service providers don’t have access to the encryption keys and cannot decrypt this data. Data that is already encrypted when it is received by Azure.Data encrypted by an application that’s running in the customer’s datacenter or by a service application. Client-side encryptionĬlient-side encryption is performed outside of Azure. With client-side encryption, you can manage and store keys on-premises or in another secure location. Azure encryption modelsĪzure supports various encryption models, including server-side encryption that uses service-managed keys, customer-managed keys in Key Vault, or customer-managed keys on customer-controlled hardware. This article summarizes and provides resources to help you use the Azure encryption options.įor a more detailed discussion of how data at rest is encrypted in Azure, see Azure Data Encryption-at-Rest. Microsoft also provides encryption to protect Azure SQL Database, Azure Cosmos DB, and Azure Data Lake.ĭata encryption at rest is available for services across the software as a service (SaaS), platform as a service (PaaS), and infrastructure as a service (IaaS) cloud models. Microsoft Azure offers a variety of data storage solutions to meet different needs, including file, disk, blob, and table storage. The media can include files on magnetic or optical media, archived data, and data backups. Encryption of data at restĭata at rest includes information that resides in persistent storage on physical media, in any digital format. Each section includes links to more detailed information. It covers the major areas of encryption, including encryption at rest, encryption in flight, and key management with Azure Key Vault. This article provides an overview of how encryption is used in Microsoft Azure.
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