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

# AWS::EventsV2::EventBus EncryptionConfiguration
<a name="aws-properties-eventsv2-eventbus-encryptionconfiguration"></a>

Encryption configuration for an event bus.

## Syntax
<a name="aws-properties-eventsv2-eventbus-encryptionconfiguration-syntax"></a>

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

### JSON
<a name="aws-properties-eventsv2-eventbus-encryptionconfiguration-syntax.json"></a>

```
{
  "[KmsKeyIdentifier](#cfn-eventsv2-eventbus-encryptionconfiguration-kmskeyidentifier)" : {{String}}
}
```

### YAML
<a name="aws-properties-eventsv2-eventbus-encryptionconfiguration-syntax.yaml"></a>

```
  [KmsKeyIdentifier](#cfn-eventsv2-eventbus-encryptionconfiguration-kmskeyidentifier): {{String}}
```

## Properties
<a name="aws-properties-eventsv2-eventbus-encryptionconfiguration-properties"></a>

`KmsKeyIdentifier`  <a name="cfn-eventsv2-eventbus-encryptionconfiguration-kmskeyidentifier"></a>
The identifier of the Amazon KMS customer managed key that the event bus uses to encrypt events. You can specify the key ARN, key ID, alias name, or alias ARN. If you do not specify a key, EventBridge uses an Amazon owned key.  
*Required*: No  
*Type*: String  
*Pattern*: `^[a-zA-Z0-9_\-/:]*$`  
*Maximum*: `2048`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)