If you need to use Autodesk products, there are several legitimate and safe ways to access them: Autodesk Education Plan : Students and educators can get free access to Autodesk software for one year (renewable) through the Autodesk Education Community Free Trials

Using a keygen to activate software is a direct violation of Autodesk's Licensing Agreement. In the United States, statutory damages for such violations can reach up to $150,000 per infringed work .

If you are a student or educator, you can get free access to Autodesk software for one year (renewable) for educational purposes.