Have you ever worked some place that requires a security clearance?<p>Well, for Apple to develop this software, they would insist on it being developed in a locked down facility that doesn&#x27;t currently exist (what Apple has is in use). I think they have said it&#x27;s only about $100,000 of developer time (so maybe 2-3 months of work), but the infrastructure that would be necessary for the work to be done in a way that doesn&#x27;t risk any leaks is expensive.