Inside GetOfflineDeviceUniqueID: How Windows Derives Its Offline Device ID
Windows exposes an undocumented function named clipc!GetOfflineDeviceUniqueID through clipc.dll , the Client Licensing Platform Client. The function returns a 32-byte, salt-scoped device identifier used by Windows licensing and device-identification components. Microsoft does not provide matching PDB symbols for clipc.dll and clipsvc.dll , so the internal function names, types,