SOFTwarfare Screen Guard is an on-device visual exfiltration prevention tool for Mac and Windows endpoints. It addresses the "analog gap" — the risk of sensitive screen content being captured via smartphone or camera — by operating a local security control loop that does not require network connectivity or cloud infrastructure. Screen Guard uses near-field scene monitoring to detect the presence of phones or cameras in the vicinity of a screen. Upon detection, it triggers a policy-driven response to prevent the capture window before sensitive content is exposed. All video processing remains on the device; when audit/evidence capture is enabled, only a single incident frame and minimal metadata are stored per event. Administrators can configure detection thresholds, debounce settings, and notification targets to reduce false positives while maintaining an audit trail. Alerts can be routed via ChatOps or email. Policies are distributed through standard endpoint management tooling, enabling consistent enforcement across an organization. Key operational characteristics: - No discrete GPU required - No cloud dependency - Designed for sensitive and air-gapped environments - Supports executive travel, secure facility workstations, meeting rooms, and visitor areas - Privacy-preserving by default - CMMC-compliant MFA validated