How Proctoring Software Detects Screen Capture
· 3 min read
Proctoring software uses screen capture APIs to monitor what students see during exams. Understanding these detection mechanisms reveals why certain methods fail and why system-level approaches work.
Screen monitoring on macOS uses a small set of system APIs for full-screen capture, live recording, and ScreenCaptureKit-based sharing. All of them honor the same window-level privacy mechanism: marked windows are excluded from results. Browser-based proctoring extensions ultimately route through these same system APIs. LDBypass creates windows that are physically rendered on screen but invisible to all capture pipelines.