What Is Zero Trust Security and Why Does It Matter in 2025?

This SecurityScorecard whitepaper-style piece explains the Zero Trust security model—its core principles (never trust, assume breach, least privilege, segmentation, continuous monitoring), enabling technologies, and how it addresses third-party and supply-chain risk—while outlining common implementation challenges and pragmatic steps (MFA, identity controls, microsegmentation, behavioral monitoring). The document also positions SecurityScorecard’s SCDR and MAX services as solutions to help organizations identify external exposures, prioritize remediation, and align vendor risk management with a Zero Trust strategy.