This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::S3::Bucket BucketEncryption
<a name="aws-properties-s3-bucket-bucketencryption"></a>

Specifies default encryption for a bucket using server-side encryption with Amazon S3-managed keys (SSE-S3), AWS KMS-managed keys (SSE-KMS), or dual-layer server-side encryption with KMS-managed keys (DSSE-KMS). For information about the Amazon S3 default encryption feature, see [Amazon S3 Default Encryption for S3 Buckets](https://docs.aws.amazon.com/AmazonS3/latest/dev/bucket-encryption.html) in the *Amazon S3 User Guide*.

## Syntax
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To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-s3-bucket-bucketencryption-syntax.json"></a>

```
{
  "[ServerSideEncryptionConfiguration](#cfn-s3-bucket-bucketencryption-serversideencryptionconfiguration)" : [ ServerSideEncryptionRule, ... ]
}
```

### YAML
<a name="aws-properties-s3-bucket-bucketencryption-syntax.yaml"></a>

```
  [ServerSideEncryptionConfiguration](#cfn-s3-bucket-bucketencryption-serversideencryptionconfiguration): 
    - ServerSideEncryptionRule
```

## Properties
<a name="aws-properties-s3-bucket-bucketencryption-properties"></a>

`ServerSideEncryptionConfiguration`  <a name="cfn-s3-bucket-bucketencryption-serversideencryptionconfiguration"></a>
Specifies the default server-side-encryption configuration.  
*Required*: Yes  
*Type*: Array of [ServerSideEncryptionRule](aws-properties-s3-bucket-serversideencryptionrule.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

## See also
<a name="aws-properties-s3-bucket-bucketencryption--seealso"></a>
+ AWS::S3::Bucket [Examples](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-s3-bucket.html#aws-properties-s3-bucket--examples)