[ellenhp]

If someone cared enough to spend money on this I think it would be an easy to medium difficulty project to use an FPGA and a CSI-2 IP to pretend to be the sensor. Good luck fixing that without baking a secure element into your sensor.

[ajdlinux]

I'd be shocked if the major sensor vendors don't already have engineers working on exactly that, though.

[radlad]

Sony has this - https://authenticity.sony.net/camera/en-us/index.html