Which of the following should NOT be a reason for retaining sensitive authentication data?

Retaining sensitive authentication data can pose significant security risks, which is why the Payment Card Industry Data Security Standard (PCI DSS) has strict guidelines regarding its retention. The key reason why "convenience" should not be a reason for retaining sensitive authentication data lies in the nature of its sensitivity and the potential for misuse.

Sensitive authentication data, such as card verification codes (CVC), PINs, or full magnetic stripe data, is highly valuable to cybercriminals. Retaining such data for convenience undermines the security measures intended to protect cardholder information. Organizations are required to justify data retention based on legitimate business needs or operational necessities, such as transaction processing or compliance with regulatory requirements. Retaining data solely for convenience fails to prioritize security and increases the risk of data breaches.

On the other hand, legitimate business reasons, required functionality (like certain transaction processes), and data integrity are all valid grounds for considering data retention, as they imply a need that aligns with business operations and regulatory compliance. Therefore, the rationale related to convenience does not meet the necessary standards for secure data handling as outlined by PCI DSS.