PCI DSS - Payment Card Industry Data Security Standard

PCI DSS (Payment Card Industry Data Security Standard) is a comprehensive security standard established by major credit card brands (Visa, Mastercard, American Express, Discover, JCB) to protect payment card data and reduce fraud. The standard applies to all organizations that store, process, or transmit cardholder data (CHD) and sensitive authentication data (SAD), regardless of size or transaction volume. PCI DSS v4.0, the latest version, consists of 12 core requirements organized into six control objectives covering network security, data protection, vulnerability management, access controls, monitoring, and information security policies. Compliance is validated through Self-Assessment Questionnaires (SAQ) for smaller merchants or annual audits by Qualified Security Assessors (QSA) for larger organizations. Failure to maintain PCI DSS compliance can result in significant financial penalties, increased transaction fees, loss of card processing privileges, reputational damage, and legal liability following data breaches. Achieving and maintaining PCI DSS compliance demonstrates commitment to protecting customer payment information and reducing cybersecurity risks.

12 PCI DSS Requirements

  • Requirement 1: Install and maintain network security controls (firewalls, routers)
  • Requirement 2: Apply secure configurations to all system components
  • Requirement 3: Protect stored account data (encryption, masking, truncation)
  • Requirement 4: Protect cardholder data with strong cryptography during transmission
  • Requirement 5: Protect all systems and networks from malicious software
  • Requirement 6: Develop and maintain secure systems and software
  • Requirement 7: Restrict access to system components and cardholder data by business need-to-know
  • Requirement 8: Identify users and authenticate access to system components

12 PCI DSS Requirements (Continued)

  • Requirement 9: Restrict physical access to cardholder data
  • Requirement 10: Log and monitor all access to system components and cardholder data
  • Requirement 11: Test security of systems and networks regularly
  • Requirement 12: Support information security with organizational policies and programs
  • Control objectives 6 categories: network security, data protection, vulnerability management, access control, monitoring, policy
  • PCI DSS v4.0 latest version effective March 2024 with 64 new requirements
  • Customized approach flexibility for implementing controls with equivalent security
  • Continuous compliance ongoing validation vs. annual snapshot

Cardholder Data & Scope

  • Primary Account Number (PAN) 16-digit credit/debit card number (most sensitive)
  • Cardholder name as printed on card
  • Expiration date card validity period
  • Service code 3-digit code in magnetic stripe
  • Sensitive Authentication Data (SAD) CAV2/CVC2/CVV2, magnetic stripe data, PINs - NEVER store after authorization
  • Cardholder Data Environment (CDE) systems, networks, processes that store, process, or transmit CHD
  • Scope reduction segmentation, tokenization, point-to-point encryption (P2PE)
  • Data flow diagrams documenting how CHD moves through systems

Merchant Levels & Validation

  • Level 1 merchants 6+ million transactions annually - annual QSA audit + quarterly ASV scans
  • Level 2 merchants 1-6 million transactions - annual SAQ + quarterly ASV scans
  • Level 3 merchants 20,000-1 million e-commerce transactions - annual SAQ + quarterly ASV scans
  • Level 4 merchants fewer than 20,000 e-commerce or 1 million total - annual SAQ + quarterly ASV scans (may vary by acquirer)
  • Self-Assessment Questionnaire (SAQ) 9 SAQ types (SAQ A, A-EP, B, B-IP, C, C-VT, D-Merchant, D-Service Provider, P2PE-HW)
  • Qualified Security Assessor (QSA) certified auditor for Level 1 merchants
  • Approved Scanning Vendor (ASV) external vulnerability scanning quarterly
  • Attestation of Compliance (AOC) annual compliance certification

Data Protection & Encryption

  • Encryption at rest AES-256 for stored cardholder data
  • Encryption in transit TLS 1.2+ for data transmission
  • Key management secure cryptographic key generation, distribution, storage, rotation, destruction
  • Tokenization replacing PAN with non-sensitive token
  • Masking displaying only first 6 and last 4 digits of PAN
  • Truncation permanently removing portion of PAN
  • Point-to-Point Encryption (P2PE) encrypting from point of interaction to processor
  • Data retention policies securely deleting CHD when no longer needed

Compliance Validation & Maintenance

  • Gap assessment initial assessment against 12 requirements
  • Remediation plan addressing gaps and implementing controls
  • Documentation policies, procedures, network diagrams, data flows
  • Quarterly scans Approved Scanning Vendor (ASV) external scans
  • Annual assessment SAQ or QSA audit depending on merchant level
  • Penetration testing annual internal and external penetration tests
  • Compliance reporting Attestation of Compliance (AOC) to acquiring bank
  • Ongoing monitoring continuous compliance monitoring and incident response

Achieve PCI DSS Compliance & Protect Payment Card Data

Navigate PCI DSS requirements and implement comprehensive security controls to protect cardholder data. Achieve and maintain compliance with expert guidance and continuous monitoring.

Request PCI DSS Compliance Consulting