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::SupportAuthZ::SupportPermit SigningKeyInfo
<a name="aws-properties-supportauthz-supportpermit-signingkeyinfo"></a>

The customer managed Amazon KMS key used to cryptographically sign a support permit.

## Syntax
<a name="aws-properties-supportauthz-supportpermit-signingkeyinfo-syntax"></a>

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

### JSON
<a name="aws-properties-supportauthz-supportpermit-signingkeyinfo-syntax.json"></a>

```
{
  "[KmsKey](#cfn-supportauthz-supportpermit-signingkeyinfo-kmskey)" : {{String}}
}
```

### YAML
<a name="aws-properties-supportauthz-supportpermit-signingkeyinfo-syntax.yaml"></a>

```
  [KmsKey](#cfn-supportauthz-supportpermit-signingkeyinfo-kmskey): {{String}}
```

## Properties
<a name="aws-properties-supportauthz-supportpermit-signingkeyinfo-properties"></a>

`KmsKey`  <a name="cfn-supportauthz-supportpermit-signingkeyinfo-kmskey"></a>
The Amazon Resource Name (ARN) of the customer managed Amazon KMS key used to sign permit grants. The key must be an asymmetric Amazon KMS key configured for signing and verification (key spec `ECC_NIST_P384`, key usage `SIGN_VERIFY`).  
*Required*: Yes  
*Type*: String  
*Pattern*: `^[a-zA-Z0-9/:_-]{1,512}$`  
*Minimum*: `1`  
*Maximum*: `512`  
*Update requires*: [Replacement](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-replacement)