# KeyUsage
<a name="API_KeyUsage"></a>

The key usage extension defines the purpose (e.g., encipherment, signature) of the key contained in the certificate.

## Contents
<a name="API_KeyUsage_Contents"></a>

 ** UsageFlags **   <a name="PcaConnectorAd-Type-KeyUsage-UsageFlags"></a>
The key usage flags represent the purpose (e.g., encipherment, signature) of the key contained in the certificate.  
Type: [KeyUsageFlags](API_KeyUsageFlags.md) object  
Required: Yes

 ** Critical **   <a name="PcaConnectorAd-Type-KeyUsage-Critical"></a>
Sets the key usage extension to critical.  
Type: Boolean  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/pca-connector-ad-2018-05-10/KeyUsage) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/pca-connector-ad-2018-05-10/KeyUsage) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/pca-connector-ad-2018-05-10/KeyUsage)