AutoDWG DWGLock

A powerful and fast dwg tools, Protecting drawing file, Keep others from modifying/copying your design.DWGLock is a stand-alone application, no AutoCAD required; Supports AutoCAD R2.9 thru 2011 drawings. Features: Powerful encryption, secure the entities in the drawing, they can not copy nor change it ; Recipients can open up protected drawing, and add lines etc to the drawing file;