C3W3 - Models on IoT Devices and Security

Let’s assume that we are building a model using private data and perhaps not necessarily there is some kind of novelty with the model architecture.

Are there any security concerns in terms of someone else that could take this model and use it?
Since we are putting our model on an edge device, is anything that could we do about it to limit that factor?

How about securing access to your edge devices via a VPN?