# efs-encrypted-check
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Checks if Amazon Elastic File System (Amazon EFS) is configured to encrypt the file data using AWS Key Management Service (AWS KMS). The rule is NON\_COMPLIANT if the encrypted key is set to false on `DescribeFileSystems` or if the `KmsKeyId` key on `DescribeFileSystems` does not match the `KmsKeyId` parameter.



**Identifier:** EFS\_ENCRYPTED\_CHECK

**Resource Types:** AWS::EFS::FileSystem

**Trigger type:** Periodic

**AWS Region:** All supported AWS regions

**Parameters:**

KmsKeyId (Optional)Type: String  
Amazon Resource Name (ARN) of the KMS key that is used to encrypt the EFS file system.

## AWS CloudFormation template
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To create AWS Config managed rules with AWS CloudFormation templates, see [Creating AWS Config Managed Rules With AWS CloudFormation Templates](aws-config-managed-rules-cloudformation-templates.md).

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for AWS Config. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query config` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).