The PCI DSS (Payment Card Industry Data Security Standard) is now on its fourth version. The withdrawal date for v3.2.1 is 31 March 2024. Many organisations around the world - particularly those that fall below the top tier of payment card transaction volumes - are not yet compliant with the new version. This book: Explains the fundamental concepts of PCI DSS v4.0; Is a perfect quick reference guide for PCI professionals, or a handy introduction for people new to the payment card industry; and Covers the consequences of a data breach and how to comply with the Standard, giving practical insights. An ideal introduction to PCI DSS v4.0 Organisations that accept payment cards are prey for criminal hackers trying to steal financial information and commit identity fraud. Many attacks are highly automated, searching for website and payment card system vulnerabilities remotely, using increasingly sophisticated tools and techniques. This guide will help you understand: How you can comply with the requirements of the Standard; The PCI DSS and ISO/IEC 27001:2022; PTS (PIN Transaction Security); and P2PE (Point-to-point encryption).