# Source: https://infisical.com/docs/documentation/platform/kms-configuration/aws-hsm.md

> ## Documentation Index
> Fetch the complete documentation index at: https://infisical.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# AWS CloudHSM

> Learn how to manage encryption using AWS CloudHSM

This guide provides instructions on securing Infisical project secrets using AWS CloudHSM.
Integration with AWS CloudHSM is achieved by configuring it as a custom key store for AWS KMS.
Follow the steps below to set up AWS KMS with AWS CloudHSM as the custom key store.

## Prepare AWS CloudHSM Cluster

Before you get started, you'll need to configure a AWS CloudHSM cluster which meets the following criteria:

* The cluster must be active.
* The cluster must not be associated with any other AWS KMS custom key store.
* The cluster must be configured with private subnets in at least two Availability Zones in the Region.
* The security group for the cluster must include inbound and outbound rules that allow TCP traffic on ports 2223-2225.
* The cluster must contain at least two active HSMs in different Availability Zones.

For more details on setting up your cluster, refer to the following [AWS documentation](https://docs.aws.amazon.com/kms/latest/developerguide/create-keystore.html#before-keystore).

## Set Up AWS KMS Custom Key Store

To set up an AWS KMS custom key store with AWS CloudHSM, you will need the following:

* The trust anchor certificate of your AWS CloudHSM cluster.
* A `kmsuser` user in the AWS CloudHSM cluster with the crypto-user role.

<Steps>
  <Step title="Navigate to Key store creation page">
    In the AWS console, head over to `AWS KMS` > `AWS CloudHSM key stores` and click **Create key store**.
  </Step>

  <Step title="Add key store name">
    Input the custom key store name. <img src="https://mintlify.s3.us-west-1.amazonaws.com/infisical/images/platform/kms/aws-hsm/create-key-store-name.png" alt="Set key store name" />
  </Step>

  <Step title="Select HSM cluster">
    Select the AWS CloudHSM cluster. You should be able to select the cluster if it meets the required criteria mentioned above.
    <img src="https://mintlify.s3.us-west-1.amazonaws.com/infisical/images/platform/kms/aws-hsm/create-key-store-cluster.png" alt="Set key store cluster" />
  </Step>

  <Step title="Upload trust anchor certificate">
    Upload your CloudHSM's cluster trust anchor certificate file.
    <img src="https://mintlify.s3.us-west-1.amazonaws.com/infisical/images/platform/kms/aws-hsm/create-key-store-cert.png" alt="Set key store cert" />
  </Step>

  <Step title="Provide cluster user password">
    Input the password of the `kmsuser` crypto-user in your cluster.
    <img src="https://mintlify.s3.us-west-1.amazonaws.com/infisical/images/platform/kms/aws-hsm/create-key-store-password.png" alt="Set key store password" />
  </Step>

  <Step title="Finish key store creation">
    Proceed with creating the AWS CloudHSM key store.
  </Step>
</Steps>

For more details, refer to the following [AWS documentation](https://docs.aws.amazon.com/kms/latest/developerguide/create-keystore.html#create-keystore-console).

## Create AWS KMS Key

Next, you'll need to create a AWS KMS key where you will set the key store you created previously.

<Steps>
  <Step title="Navigate to AWS KMS key creation page">
    In your AWS console, proceed to `AWS KMS` > `Customer managed keys` and click **Create**.
  </Step>

  <Step title="Set key options">
    Set Key type to `Symmetric` and Key usage to `Encrypt and decrypt`.
    <img src="https://mintlify.s3.us-west-1.amazonaws.com/infisical/images/platform/kms/aws-hsm/create-kms-key-1.png" alt="Set key options 1" />
  </Step>

  <Step title="Select key material origin">
    In the advanced options, for the Key material origin field, select `AWS CloudHSM key store`. Then, click next.
    <img src="https://mintlify.s3.us-west-1.amazonaws.com/infisical/images/platform/kms/aws-hsm/create-kms-key-2.png" alt="Set key options 2" />
  </Step>

  <Step title="Choose key store">
    Select the AWS CloudHSM key store you created earlier.
    <img src="https://mintlify.s3.us-west-1.amazonaws.com/infisical/images/platform/kms/aws-hsm/create-kms-select-hsm.png" alt="Select HSM 1" />
  </Step>

  <Step title="Finish KMS key creation">
    Proceed with creating the AWS KMS Key.
  </Step>
</Steps>

## Connect Infisical to AWS KMS Key

You should now have an AWS KMS that has a custom key store set to AWS CloudHSM.
To secure project resources, you will need to add this AWS KMS to your Infisical organization. To learn how, refer to the documentation [here](./aws-kms).