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---
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layout: docs
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page_title: HSM Integration - Vault Enterprise
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sidebar_title: HSM Support
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description: >-
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Vault Enterprise has HSM support, allowing for external master key storage and
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automatic unsealing.
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---
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# Vault Enterprise HSM Support
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2020-01-25 00:18:22 +00:00
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-> **Note**: This feature requires [Vault Enterprise](https://www.hashicorp.com/products/vault/)
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with the Governance & Policy Module.
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- Master Key Wrapping: Vault protects its master key by transiting it through
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the HSM for encryption rather than splitting into key shares
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- Automatic Unsealing: Vault stores its HSM-wrapped master key in storage,
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allowing for automatic unsealing
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- [Seal Wrapping](/docs/enterprise/sealwrap) to provide FIPS
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KeyStorage-conforming functionality for Critical Security Parameters
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- [Entropy Augmentation](/docs/enterprise/entropy-augmentation) to
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allow Vault to sample entropy from an external cryptographic module.
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2018-05-13 20:39:22 +00:00
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HSM support is available for devices that support PKCS#11 version 2.20+
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interfaces and provide integration libraries, and is currently available for
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linux/amd64 platforms only. It has successfully been tested against many
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different vendor HSMs; HSMs that provide only subsets of the full PKCS#11
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specification can usually be supported but it depends on available
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cryptographic mechanisms.
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2018-03-01 00:20:54 +00:00
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2018-05-13 20:39:22 +00:00
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Please note however that configuration details, flags, and supported features
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within PKCS#11 vary depending on HSM model and configuration. Consult your
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HSM's documentation for more details.
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Some parts of Vault work differently when using an HSM. Please see the
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[Behavioral Changes](/docs/enterprise/hsm/behavior) page for
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important information on these differences.
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The [Configuration](/docs/configuration/seal/pkcs11) page contains
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configuration information.
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Finally, the [Security](/docs/enterprise/hsm/security) page contains
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information about deploying Vault's HSM support in a secure fashion.
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