PCI DSS 6.4.3 & 11.6.1: What QSAs Expect to See
Back in 2022, PCI DSS v4.0 set the stage for a new era of payment security. For the first time, it asked organizations to look beyond their servers and into the browser itself. Then, on April 1, 2025, the “future-dated” requirements, 6.4.3 and 11.6.1, moved from guidance to mandate, decisively shifting attention to mitigating client-side risk. In plain English, the spotlight is now on what’s happening in the browser.