# AmexAttributes
<a name="API_AmexAttributes"></a>

Parameters to derive the confidentiality and integrity keys for a payment card using Amex derivation method.

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

 ** ApplicationTransactionCounter **   <a name="paymentcryptographydata-Type-AmexAttributes-ApplicationTransactionCounter"></a>
The transaction counter of the current transaction that is provided by the terminal during transaction processing.  
Type: String  
Length Constraints: Fixed length of 4.  
Pattern: `[0-9a-fA-F]+`   
Required: Yes

 ** AuthorizationRequestKeyIdentifier **   <a name="paymentcryptographydata-Type-AmexAttributes-AuthorizationRequestKeyIdentifier"></a>
The `keyArn` of the issuer master key for cryptogram (IMK-AC) for the payment card.  
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

 ** MajorKeyDerivationMode **   <a name="paymentcryptographydata-Type-AmexAttributes-MajorKeyDerivationMode"></a>
The method to use when deriving the master key for a payment card using Amex derivation.  
Type: String  
Valid Values: `EMV_OPTION_A | EMV_OPTION_B`   
Required: Yes

 ** PanSequenceNumber **   <a name="paymentcryptographydata-Type-AmexAttributes-PanSequenceNumber"></a>
A number that identifies and differentiates payment cards with the same Primary Account Number (PAN). Typically 00 is used, if no value is provided by the terminal.  
Type: String  
Length Constraints: Fixed length of 2.  
Pattern: `[0-9]+`   
Required: Yes

 ** PrimaryAccountNumber **   <a name="paymentcryptographydata-Type-AmexAttributes-PrimaryAccountNumber"></a>
The Primary Account Number (PAN) of the cardholder.  
Type: String  
Length Constraints: Minimum length of 12. Maximum length of 19.  
Pattern: `[0-9]+`   
Required: Yes

 ** CurrentPinAttributes **   <a name="paymentcryptographydata-Type-AmexAttributes-CurrentPinAttributes"></a>
The encrypted pinblock of the old pin stored on the chip card.  
Type: [CurrentPinAttributes](API_CurrentPinAttributes.md) object  
Required: No

## See Also
<a name="API_AmexAttributes_SeeAlso"></a>

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