# CardHolderVerificationValue
<a name="API_CardHolderVerificationValue"></a>

Card data parameters that are required to generate a cardholder verification value for the payment card.

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

 ** ApplicationTransactionCounter **   <a name="paymentcryptographydata-Type-CardHolderVerificationValue-ApplicationTransactionCounter"></a>
The transaction counter value that comes from a point of sale terminal.  
Type: String  
Length Constraints: Minimum length of 2. Maximum length of 4.  
Pattern: `[0-9a-fA-F]+`   
Required: Yes

 ** PanSequenceNumber **   <a name="paymentcryptographydata-Type-CardHolderVerificationValue-PanSequenceNumber"></a>
A number that identifies and differentiates payment cards with the same Primary Account Number (PAN).  
Type: String  
Length Constraints: Fixed length of 2.  
Pattern: `[0-9]+`   
Required: Yes

 ** UnpredictableNumber **   <a name="paymentcryptographydata-Type-CardHolderVerificationValue-UnpredictableNumber"></a>
A random number generated by the issuer.  
Type: String  
Length Constraints: Minimum length of 2. Maximum length of 8.  
Pattern: `[0-9a-fA-F]+`   
Required: Yes

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

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/payment-cryptography-data-2022-02-03/CardHolderVerificationValue) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/payment-cryptography-data-2022-02-03/CardHolderVerificationValue) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/payment-cryptography-data-2022-02-03/CardHolderVerificationValue) 

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for AWS Payment Cryptography Data Plane. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query payment-cryptography` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).