What is Cardholder Data in Cybersecurity?

Cardholder data (CHD) is the full Primary Account Number (PAN) or the PAN together with related card details such as the cardholder name, expiration date, or service code. According to the Payment Card Industry Data Security Standard (PCI DSS), these data elements must be protected when stored, processed, or transmitted within payment environments.

Organizations that handle payment card information must protect CHD to reduce the risk of fraud, unauthorized access, and compliance violations.

What information qualifies as cardholder data?

PCI DSS distinguishes between cardholder data and sensitive authentication data (SAD). While both require protection, they are subject to different storage and security requirements.

A key distinction is that sensitive authentication data generally cannot be stored after authorization, whereas certain CHD elements may be retained if properly protected according to PCI DSS requirements.

Why is protecting cardholder data important?

Payment card data is sensitive because it can be misused for fraud and unauthorized transactions if exposed.

Failure to secure CHD can result in:

• Financial losses from fraud.
• Regulatory penalties and compliance violations.
• Reputational damage.
• Customer trust erosion.
• Legal and contractual consequences.

To mitigate these risks, organizations must implement technical, administrative, and physical security controls across their payment environments.

How is CHD protected?

Protecting cardholder data requires a layered security approach that aligns with PCI DSS requirements.

Common security controls include:

Organizations should also minimize data retention and store only the information necessary for business operations.

How Hexnode supports cardholder data protection efforts

Organizations handling payment information must ensure that endpoints accessing payment systems remain secure and compliant.

Hexnode UEM helps organizations manage and secure corporate devices through centralized endpoint management, security policies, compliance monitoring, application management, device restrictions, and remote management capabilities. By improving endpoint visibility and helping enforce security controls across managed devices, Hexnode can support PCI DSS-aligned endpoint security and CHD protection initiatives.

Cardholder data vs sensitive authentication data

Although the terms are often used together, they are not interchangeable.

Understanding the difference helps organizations apply the correct security and compliance controls.

Key takeaways

CHD refers to payment card information associated with a cardholder, including the Primary Account Number and certain related data elements. Because payment information is highly sensitive, organizations must implement strong security controls, maintain PCI DSS compliance, and secure the endpoints that interact with payment environments.