A key feature is "one device, one key" authorization, where the playback password is bound to the user's specific hardware (Machine ID).
The software can block screen recording and prevent playback if it detects an active internet connection. The Search for a "Decrypter" thundersoft drm protection decrypter
This tool is designed to convert iTunes M4V videos into lossless MP4 files. A key feature is "one device, one key"