# WrappedKeyMaterial
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Parameter information of a WrappedKeyBlock for encryption key exchange.

## Contents
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**Important**  
This data type is a UNION, so only one of the following members can be specified when used or returned.

 ** DiffieHellmanSymmetricKey **   <a name="paymentcryptographydata-Type-WrappedKeyMaterial-DiffieHellmanSymmetricKey"></a>
The parameter information for deriving a ECDH shared key.  
Type: [EcdhDerivationAttributes](API_EcdhDerivationAttributes.md) object  
Required: No

 ** Tr31KeyBlock **   <a name="paymentcryptographydata-Type-WrappedKeyMaterial-Tr31KeyBlock"></a>
The TR-31 wrapped key block.  
Type: String  
Length Constraints: Minimum length of 56. Maximum length of 9984.  
Pattern: `[0-9a-zA-Z]+`   
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/payment-cryptography-data-2022-02-03/WrappedKeyMaterial) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/payment-cryptography-data-2022-02-03/WrappedKeyMaterial) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/payment-cryptography-data-2022-02-03/WrappedKeyMaterial)