Conjecture: Isn&#x27;t Apple&#x27;s private signing key already a &quot;master key to turn 100 million locks&quot;?<p>I.e. the key they use to sign software updates. With that key, someone could create malware and sign it... Apple creating the malware just saves them a step. Ergo the &quot;target on that piece&quot; is already pretty high value, yet Apple is able to keep it secret &#x2F; prepared for contingencies (like rotating the key..)<p>Thoughts?