I understand the implication here to be "how can you trust your own hardware anyway," and the answer is "of course in theory you can't." Even if you had SGX an

I understand the implication here to be "how can you trust your own hardware anyway," and the answer is "of course in theory you can't." Even if you had SGX and wrote your algorithm or whatever to run in it, if your hardware's compromised, the horse has left the stable. Your proprietary algorithm and input that you developed on the compromised hardware are already available to the attacker. So having SGX locally is not going to help. At the end of the day, SGX is not going to defend a proprietary computation if the input and algorithm are already compromised.