Developer Builds ATLOCK v4, a Layered Windows Security Suite with Intruder Detection

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A developer has released ATLOCK v4, a Windows desktop security application designed to go beyond simple password protection by combining multiple independent security layers. The suite integrates file protection using NTFS Access Control Lists, a Fernet-encrypted password vault secured with PBKDF2-HMAC-SHA256 hashing at 200,000 iterations, and an intruder detection engine powered by OpenCV. When incorrect passwords are entered, the system automatically captures photos and video, triggers an alarm, sends notifications, and can lock down the machine entirely. Background threading keeps the user interface responsive while security operations run independently, and all logs store only masked credentials to minimise data exposure. The project, built with PyQt, OpenCV, and the Windows API, is intended to demonstrate how cryptography, OS-level features, and forensic logging can work together in a single desktop application.

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