PCI DSS v4.0
Payment card industry data security standard
§ Overview
PCI DSS (Payment Card Industry Data Security Standard) is a set of security standards ensuring that all companies accepting, processing, storing, or transmitting credit card information maintain a secure environment. Version 4.0 introduces a more flexible, outcome-based approach while strengthening requirements for authentication, encryption, and continuous monitoring. Compliance is mandatory for any organization handling cardholder data.
§ Who needs this
Any organization that accepts, processes, stores, or transmits credit card data — including e-commerce companies, retailers, payment processors, SaaS platforms with payment features, and any business that handles cardholder data. Your acquiring bank will require PCI DSS compliance.
§ Key requirements
Build & Maintain Secure Network
Install and maintain network security controls (firewalls). Apply secure configurations to all system components. Restrict access from untrusted networks.
Protect Account Data
Protect stored account data through encryption, masking, and truncation. Encrypt transmission of cardholder data across open networks using strong cryptography.
Vulnerability Management
Protect systems against malware with regularly updated anti-virus software. Develop and maintain secure systems and applications with regular patching.
Strong Access Control
Restrict access to cardholder data on a business need-to-know basis. Authenticate access to system components. Restrict physical access to cardholder data.
Network Monitoring & Testing
Log and monitor all access to network resources and cardholder data. Regularly test security systems and processes through vulnerability scans and penetration testing.
Information Security Policy
Maintain a policy that addresses information security for all personnel. Includes security awareness training and incident response procedures.
§ Steps to compliance
Determine PCI Scope
Identify all systems, people, and processes that store, process, or transmit cardholder data. Reduce scope by segmenting your cardholder data environment.
Gap Assessment
Compare current security controls against PCI DSS requirements. Identify gaps and prioritize remediation based on risk.
Remediate Gaps
Implement required controls: network segmentation, encryption, access controls, logging, vulnerability management, and security policies.
Self-Assessment or QSA Audit
Small merchants can complete a Self-Assessment Questionnaire (SAQ). Larger organizations require a Qualified Security Assessor (QSA) to conduct the audit.
Vulnerability Scanning
Conduct quarterly external vulnerability scans through an Approved Scanning Vendor (ASV). Perform annual penetration testing.
Submit Compliance Report
Submit your Report on Compliance (ROC) or SAQ to your acquiring bank. Maintain compliance through continuous monitoring and annual re-assessment.
§ What you get
Ability to process credit card payments legally
Reduced risk of cardholder data breaches and associated fines
Protection from liability for fraudulent transactions
Customer trust through secure payment handling
Compliance with bank and payment processor requirements
Reduced insurance premiums for cyber liability coverage