What is Azure Key Vault Managed HSM?

Azure Key Vault Managed HSM (Hardware Security Module) is a fully managed, highly available, single-tenant, standards-compliant cloud service that enables you to safeguard cryptographic keys for your cloud applications, using FIPS 140-2 Level 3 validated HSMs. It is one of several key management solutions in Azure.

For pricing information, please see Managed HSM Pools section on Azure Key Vault pricing page. For supported key types, see About keys.

The term "Managed HSM instance" is synonymous with "Managed HSM pool". To avoid confusion, we use "Managed HSM instance" throughout these articles.


Zero Trust is a security strategy comprising three principles: "Verify explicitly", "Use least privilege access", and "Assume breach". Data protection, including key management, supports the "use least privilege access" principle. For more information, see What is Zero Trust?

Why use Managed HSM?

Fully managed, highly available, single-tenant HSM as a service

  • Fully managed: HSM provisioning, configuration, patching, and maintenance is handled by the service.
  • Highly available: Each HSM cluster consists of multiple HSM partitions. If the hardware fails, member partitions for your HSM cluster will be automatically migrated to healthy nodes. For more information, see Managed HSM Service Level Agreement
  • Single-tenant: Each Managed HSM instance is dedicated to a single customer and consists of a cluster of multiple HSM partitions. Each HSM cluster uses a separate customer-specific security domain that cryptographically isolates each customer's HSM cluster.

Access control, enhanced data protection & compliance

  • Centralized key management: Manage critical, high-value keys across your organization in one place. With granular per key permissions, control access to each key on the 'least privileged access' principle.
  • Isolated access control: Managed HSM "local RBAC" access control model allows designated HSM cluster administrators to have complete control over the HSMs that even management group, subscription, or resource group administrators cannot override.
  • Private endpoints: Use private endpoints to securely and privately connect to Managed HSM from your application running in a virtual network.
  • FIPS 140-2 Level 3 validated HSMs: Protect your data and meet compliance requirements with FIPS (Federal Information Protection Standard) 140-2 Level 3 validated HSMs. Managed HSMs use Marvell LiquidSecurity HSM adapters.
  • Monitor and audit: fully integrated with Azure monitor. Get complete logs of all activity via Azure Monitor. Use Azure Log Analytics for analytics and alerts.
  • Data residency: Managed HSM doesn't store/process customer data outside the region the customer deploys the HSM instance in.

Integrated with Azure and Microsoft PaaS/SaaS services

Uses same API and management interfaces as Key Vault

  • Easily migrate your existing applications that use a vault (a multi-tenant) to use Managed HSMs.
  • Use same application development and deployment patterns for all your applications irrespective of key management solution in use: multi-tenant vaults or single-tenant Managed HSMs.

Import keys from your on-premises HSMs

  • Generate HSM-protected keys in your on-premises HSM and import them securely into Managed HSM.

Next steps