What are you going to do with private signing keys? Compromise an iPhone? Unlock an iPhone? Like how the FBI paid $900,000 to do so and get exactly what they w

What are you going to do with private signing keys? Compromise an iPhone? Unlock an iPhone? Like how the FBI paid $900,000 to do so and get exactly what they wanted (at least with respect to the phone) in the San Bernardino case which you are referencing? Or how the going price for a iOS zero-click remote code execution with persistence, which basically gives you the ability to arbitrarily compromise any iPhone at any time, on Zerodium is $2M? You can get effectively the same outcome as stealing their signing keys for $2M or less in a way that is far less traceable or detectable. There are so many ways in and to get what you want that the fact that one of them, which is not even clearly the best or easiest way, being untouched is not exactly a cause for celebration or indicative of the quality of that defense. The cash register being untouched because the safe door was wide open is not exactly a very compelling security story. So, no, they do not reach the $10M level. Not even close.