Explain the concept of zero trust security architecture and how it differs from traditional perimeter-based security models.

Zero trust security architecture assumes that threats may exist both inside and outside the traditional network perimeter. It focuses on verifying the identity and trustworthiness of users, devices, and applications before granting access to resources, regardless of their location. Unlike traditional perimeter-based security models, zero trust emphasizes continuous authentication, least privilege access controls, and micro-segmentation to protect against insider threats and lateral movement by attackers.