This solution brief explains how Phosphorus extends Zero Trust principles to unmanaged IoT, OT, IIoT, and IoMT devices. Many connected assets use default credentials, outdated firmware, insecure services, expired certificates, or prohibited components that traditional tools cannot fully identify or remediate. Phosphorus maps its capabilities to CISA’s Identity, Device, Network, and Data pillars through high-fidelity discovery, risk assessment, role-based administration, password rotation, firmware management, configuration hardening, certificate replacement, isolation, and continuous monitoring. The platform supports least privilege, trusted device identity, encrypted communication, and protection against lateral movement. It also helps organizations align with CISA ZTMM, OMB guidance, NDA

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