# s3-default-encryption-kms
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Checks if the S3 buckets are encrypted with Amazon Key Management Service (Amazon KMS). The rule is NON\_COMPLIANT if the S3 bucket is not encrypted with an Amazon KMS key. 



**Identifier:** S3\_DEFAULT\_ENCRYPTION\_KMS

**Resource Types:** AWS::S3::Bucket, AWS::KMS::Key

**Trigger type:** Configuration changes

**Amazon Web Services Region:** All supported Amazon regions

**Parameters:**

kmsKeyArns (Optional)Type: CSV  
Comma separated list of Amazon KMS key ARNs allowed for encrypting Amazon S3 Buckets.

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