This white paper argues that traditional perimeter-based security is obsolete in a world of hybrid work, SaaS adoption, and cloud-first infrastructure. Data no longer resides in a single location but flows across devices, networks, and external partners. Proofpoint outlines a people-centric model that shifts focus from securing infrastructure to protecting users and the data they handle. The framework integrates threat protection, insider risk management, data loss prevention, and adaptive controls across channels. By treating users as the new perimeter and combining behavioral and contextual intelligence, organizations can better defend against modern data threats.

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