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::CloudFront::PublicKey
<a name="aws-resource-cloudfront-publickey"></a>

A public key that you can use with [signed URLs and signed cookies](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/PrivateContent.html), or with [field-level encryption](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/field-level-encryption.html).

CloudFront supports signed URLs and signed cookies with RSA 2048 or ECDSA 256 key signatures. Field-level encryption is only compatible with RSA 2048 key signatures.

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

### JSON
<a name="aws-resource-cloudfront-publickey-syntax.json"></a>

```
{
  "Type" : "AWS::CloudFront::PublicKey",
  "Properties" : {
      "[PublicKeyConfig](#cfn-cloudfront-publickey-publickeyconfig)" : PublicKeyConfig
    }
}
```

### YAML
<a name="aws-resource-cloudfront-publickey-syntax.yaml"></a>

```
Type: AWS::CloudFront::PublicKey
Properties:
  [PublicKeyConfig](#cfn-cloudfront-publickey-publickeyconfig): 
    PublicKeyConfig
```

## Properties
<a name="aws-resource-cloudfront-publickey-properties"></a>

`PublicKeyConfig`  <a name="cfn-cloudfront-publickey-publickeyconfig"></a>
Configuration information about a public key that you can use with [signed URLs and signed cookies](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/PrivateContent.html), or with [field-level encryption](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/field-level-encryption.html).  
*Required*: Yes  
*Type*: [PublicKeyConfig](aws-properties-cloudfront-publickey-publickeyconfig.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

## Return values
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### Ref
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When you pass the logical ID of this resource to the intrinsic `Ref` function, `Ref` returns the ID of the public key. For example: `K36X4X2EO997HM`.

For more information about using the `Ref` function, see [https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-ref.html).

### Fn::GetAtt
<a name="aws-resource-cloudfront-publickey-return-values-fn--getatt"></a>

The `Fn::GetAtt` intrinsic function returns a value for a specified attribute of this type. The following are the available attributes and sample return values.

For more information about using the `Fn::GetAtt` intrinsic function, see [https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-getatt.html](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/intrinsic-function-reference-getatt.html).

#### 
<a name="aws-resource-cloudfront-publickey-return-values-fn--getatt-fn--getatt"></a>

`CreatedTime`  <a name="CreatedTime-fn::getatt"></a>
The date and time when the public key was uploaded.

`Id`  <a name="Id-fn::getatt"></a>
The identifier of the public key.