Chapter 1
Card Ecosystem, CHD, and Scoping
Who's who in the card ecosystem (issuer, acquirer, brand, merchant, service provider), what counts as Cardholder Data (CHD) vs Sensitive Authentication Data (SAD), and how to identify the Cardholder Data Environment (CDE).
Key concepts
- CHD: PAN, cardholder name, expiration date, service code
- SAD: full magnetic stripe, CVV2/CID, PIN/PIN block (NEVER store post-authorisation)
- CDE = any system that stores, processes, transmits, or is connected to CHD
- Merchant levels 1-4 (based on transaction volume per brand)
Hands-on practice
Day 10: Scope a PCI DSS assessment — identify the CDE →