Encryption is useless. It just makes it a little harder to get the end result, because we have to rip with ninjaripper, import in blender. Rename all object to their real name in cmshowroom and same for the materials. Copy shader materials and make it fit to the physics. And you loose any applied 3D bones and animation, on the model, but the model is there. estimated time : 3 hours to extract an encrypted car.
I wanted the vrc F2007 and the rss F10, and I got them like that. Even though they are encrypted. If someone wants your model, they will get it without much issues aside time consumed