# DukptDerivationAttributes
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Parameters required for encryption or decryption of data using DUKPT.

## Contents
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 ** KeySerialNumber **   <a name="paymentcryptographydata-Type-DukptDerivationAttributes-KeySerialNumber"></a>
The unique identifier known as Key Serial Number (KSN) that comes from an encrypting device using DUKPT encryption method. The KSN is derived from the encrypting device unique identifier and an internal transaction counter.  
Type: String  
Length Constraints: Minimum length of 16. Maximum length of 24.  
Pattern: `(?:[0-9a-fA-F]{16}|[0-9a-fA-F]{20}|[0-9a-fA-F]{24})`   
Required: Yes

 ** DukptKeyDerivationType **   <a name="paymentcryptographydata-Type-DukptDerivationAttributes-DukptKeyDerivationType"></a>
The key type derived using DUKPT from a Base Derivation Key (BDK) and Key Serial Number (KSN). This must be less than or equal to the strength of the BDK. For example, you can't use `AES_128` as a derivation type for a BDK of `AES_128` or `TDES_2KEY`   
Type: String  
Valid Values: `TDES_2KEY | TDES_3KEY | AES_128 | AES_192 | AES_256`   
Required: No

 ** DukptKeyVariant **   <a name="paymentcryptographydata-Type-DukptDerivationAttributes-DukptKeyVariant"></a>
The type of use of DUKPT, which can be for incoming data decryption, outgoing data encryption, or both.  
Type: String  
Valid Values: `BIDIRECTIONAL | REQUEST | RESPONSE`   
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/DukptDerivationAttributes) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/payment-cryptography-data-2022-02-03/DukptDerivationAttributes) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/payment-cryptography-data-2022-02-03/DukptDerivationAttributes)