Is that really true though?  My understanding here is that the biggest blocker is the code signing process - the FBI or the NSA could probably build a backdoored OS, but they couldn&#x27;t install it on the phone without apple&#x27;s signing cert.  Depending on Apple&#x27;s internal security, it may very well be impossible for a single person to sign anything other than an official iOS release, making it impossible for an agressor nation or a disgruntled employee or anybody else other than apple as a whole to get a backdoor onto an iOS device.