# OutgoingTr31KeyBlock
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Parameter information of the TR31WrappedKeyBlock containing the transaction key wrapped using a KEK.

## Contents
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 ** WrappingKeyIdentifier **   <a name="paymentcryptographydata-Type-OutgoingTr31KeyBlock-WrappingKeyIdentifier"></a>
The `keyARN` of the KEK used to wrap the transaction key.  
Type: String  
Length Constraints: Minimum length of 7. Maximum length of 322.  
Pattern: `arn:aws:payment-cryptography:[a-z]{2}-[a-z]{1,16}-[0-9]+:[0-9]{12}:(key/[0-9a-zA-Z]{16,64}|alias/[a-zA-Z0-9/_-]+)$|^alias/[a-zA-Z0-9/_-]+`   
Required: Yes

## 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/payment-cryptography-data-2022-02-03/OutgoingTr31KeyBlock) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/payment-cryptography-data-2022-02-03/OutgoingTr31KeyBlock) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/payment-cryptography-data-2022-02-03/OutgoingTr31KeyBlock)