I wonder what opportunities exist for a malicious actor to intercept the data flow and substitute it with their own, either for the purposes of devaluing someon

I wonder what opportunities exist for a malicious actor to intercept the data flow and substitute it with their own, either for the purposes of devaluing someone else's cow or to increase the value of their own--or even to generate fake cow biometrics, feed them directly to devices, and pretend you have a real, live herd.