Hello friends! In this tutorial, we will learn how to share a Simulink design without distributing its editable implementation. You may have developed a controller, a signal-processing algorithm or a plant model that another person needs to simulate. The challenge is to give that person a usable component while keeping your original design private. The original version of this tutorial used a generated S-function. We will keep that method, explain what it actually protects and then look at the protected-model workflow available in current Simulink releases. These approaches produce different deliverables, so the right choice depends on what the recipient needs to do. If you are distributing MATLAB functions rather than Simulink models, see our tutorial on converting MATLAB M-files to P-fil ...