Computing Lock Screen

A “COMPUTING · DO NOT TOUCH” lock screen for when long jobs run unattended.

Source on GitHub · MIT

Keeps your jobs running. Covers every monitor while builds, training or downloads continue in the background.
Password unlock. Wrong attempts are logged and never lock you out.
Knows if someone tried. Optional camera, keyboard and mouse detection, with snapshots and a summary when you return.
Stays awake. Stops the computer from sleeping or turning the display off while it is locked.

With camera detection: Windows, Linux. A deterrent, not a security lock: use your system lock for real security.

Features

Lock screen: A custom title, subtitle and note on every monitor, always on top, while background programs keep running.
Password unlock: The password is stored as a PBKDF2 hash. Wrong attempts are logged but never lock you out.
Camera detection: Optional: check interval, sensitivity and face detection, with snapshots saved when something is detected. Snapshots are deleted automatically after 24 hours by default.
Keyboard and mouse: Activity is detected and reported at most once every 3 seconds.
Blocks shortcuts: Windows: Win key, Alt+Tab, Alt+Esc and Alt+F4. Linux X11: all window-manager shortcuts.
Stays awake: Prevents sleep and the display from turning off while locked.
Summary: Shows what happened while you were away after you unlock; logs are kept in a logs folder.
Limits: Ctrl+Alt+Del on Windows and Ctrl+Alt+F1–F12 on Linux cannot be blocked by any program, so treat it as a “don't touch” sign, not a security lock.

Windows: Put the .exe in its own folder and double-click it. If SmartScreen appears, choose More info → Run anyway. The camera version is larger (about 61 MB).
Linux: Put the file in its own folder, then chmod +x ComputingLock && ./ComputingLock. Use an X11 session for full protection.