Updates in PCI DSS 4.0: What SaaS Platforms Should Know
Blog post from Basis Theory
PCI DSS 4.0, the major update to the global payment-card security standard, replaces version 3.2.1 after March 31, 2024 and introduces expanded security, documentation, and assessment expectations for merchants and service providers, including SaaS platforms. Organizations may use either the traditional defined approach or, for risk-mature entities undergoing a Report on Compliance assessment, a customized approach supported by control matrices, testing, and justification. Key changes include more detailed Attestations of Compliance, protections against remote copying of cardholder data, authenticated vulnerability scanning, stronger encryption practices for cloud and data-center environments, active malware scanning, corporate-wide anti-phishing controls, longer passwords, updated lockout thresholds, stronger MFA, service-account password rotation, and more continuous, zero-trust-oriented access decisions. PCI 4.0 also requires monitoring for failed security controls, tampering with payment-page content or headers, and covert malware communications, potentially requiring new tools, configurations, operating processes, and employee training. Businesses are encouraged to evaluate existing controls, identify technology and budget needs, and prepare for implementation, as compliance can improve security, partnerships, payment-provider interoperability, and customer experiences.
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