&gt; My understanding is that iOS 9 changed things so that this kind of forensics backdoor is no longer possible, mooting this discussion.<p>The question Apple would like to avoid is if, in the future, creating such a backdoor-resistant OS will be illegal.  iOS 9.2.1 (the latest pre-ruling release) is legal; however, any future releases of the OS with this capability may be considered a circumvention of or non-compliance with the ruling.