Earlier quoted context omitted.
Apple’s Activation Lock lead to a substantial drop in smartphone theft worldwide. That’s something worthy of consideration. Apple must not re-incentivize phone theft to harvest parts. https://techcrunch.com/2015/02/11/apples-activation-lock-lea...
It also considerably reduces the ability of nation-state attackers to replace parts with modified hardware without your knowledge, as Apple can detect and terminate misuse of the tool that creates new cryptographic signing keys for the pairing of phone and part. We saw signed-pairing appear with the Touch ID system in response to Apple learning of nation-state attacks on the iPhone that used hardware modifications. T…
Random-ass repair shops are not going to expend the effort of putting in fake parts to hack you to.. hack a couple of thousand dollars off of your account and then get caught due to it easily being traceable to the repair shop?
The only people who need protection from hardware-swap hacks are people like journalists. And if you are one, you shouldn’t be giving people physical access to your device regardless.
Here is a simple solution: give the normal user (after a passcode unlock) a pop-up: ‘your X has been replaced. Do you wish to authorize this new part for use with your iPhone?’.
Make it so that if your phone is set to the new Lockdown mode, you cannot authorize any new parts.