Skip to main content
Storage account keys are the master credentials for Azure Storage. They grant full access to blobs, queues, tables, and files in a storage account, so treat them like a root password: restrict distribution, store securely, and rotate regularly. Anyone who has a storage account key can read, write, and delete data across all services in that account. Because of this high level of privilege, follow best practices for limiting exposure and prefer scoped or short-lived alternatives where possible.
A slide titled "Storage Account Keys" showing warning cards on the left that say "Be cautious with the account key!" and "Two keys." On the right is a portal-style panel listing key1 and key2 entries with their keys and connection strings.

​
Why storage account keys are sensitive

  • Keys allow full account-level control (read, write, delete) across all storage services.
  • Keys are long-lived by default; leakage carries high impact.
  • Azure provides two keys (primary and secondary) to enable rotation with zero downtime.
Use the two-key pattern to rotate keys without interrupting services that rely on them:
  1. Regenerate the secondary key (Key2) using the Azure Portal, CLI, or PowerShell.
  2. Update your applications and services to use the new secondary key.
  3. Regenerate the primary key (Key1) once all usage of the old primary key has been replaced.
You can regenerate keys from:
  • Azure Portal: Storage account -> Access keys
  • Azure CLI: az storage account keys renew and related commands — see Azure CLI docs
  • Azure PowerShell: commands under the Storage module — see Azure PowerShell docs
Rotate keys in a staged manner: always create a replacement key, switch clients to it, then rotate the other key. This minimizes downtime and avoids service interruptions.
Example connection string (replace placeholders with your account values):

​
Safer alternatives to sharing account keys

​
Store and rotate secrets securely

  • Store keys and other secrets in Azure Key Vault rather than in source code or config files. See Azure Key Vault.
  • Automate rotation and secret updates using Azure Automation, Azure Functions, or your CI/CD pipelines.
  • For high-security scenarios, combine Key Vault with Managed Identities so services fetch secrets at runtime.
Never publish storage account keys or commit them to source control. Treat keys as highly sensitive credentials.

​
Quick reference summary

  • Storage account keys grant full control and must be protected.
  • Use the two-key rotation pattern to avoid downtime during regeneration.
  • Prefer SAS, Azure AD (RBAC), and Managed Identities over distributing account keys.
  • Store keys in Azure Key Vault and automate rotation via scripts or CI/CD.

Watch Video