# KeyUsage


The Key Usage X.509 v3 extension defines the purpose of the public key contained in the certificate.

## Contents


**Note**  
In the following list, the required parameters are described first.

 ** Name **   <a name="ACM-Type-KeyUsage-Name"></a>
A string value that contains a Key Usage extension name.  
Type: String  
Valid Values: `DIGITAL_SIGNATURE | NON_REPUDIATION | KEY_ENCIPHERMENT | DATA_ENCIPHERMENT | KEY_AGREEMENT | CERTIFICATE_SIGNING | CRL_SIGNING | ENCIPHER_ONLY | DECIPHER_ONLY | ANY | CUSTOM`   
Required: No

## See Also


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/acm-2015-12-08/KeyUsage) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/acm-2015-12-08/KeyUsage) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/acm-2015-12-08/KeyUsage)