Which of the following is a component of Sensitive Authentication Data?

Sensitive Authentication Data includes information that is critical to the verification of the authenticity of a transaction. This specifically includes details that aid in verifying whether the user or account holder is genuine and authorized to conduct a transaction. In the context of payment card data, Sensitive Authentication Data encompasses security codes that are used during payment processing, such as CAV2, CVC2, CVV2, or CID. These codes are specifically designed to provide an additional layer of security during card-not-present transactions and are tightly regulated under PCI DSS guidelines.

In contrast, while phone numbers, addresses, and transaction history may involve personal data or transaction details, they do not meet the criteria of Sensitive Authentication Data under PCI DSS. These elements may contain valuable information, but they do not serve the purpose of authenticating the user in the same manner as the codes mentioned in the correct answer. Thus, the identification of CAV2/CVC2/CVV2/CID as a component of Sensitive Authentication Data accurately reflects its role in ensuring the security of payment transactions.