So says NATO:
And here’s Apple’s own announcement:
But with a nod to the recent posts here from users unhappy about how user-UNfriendly Apple’s OSs seem to have become, perhaps iPhones and iPads are only so secure because they’ve become impossible to use! 
Long time Apple/Mac/iOS, OS user, as well as investor back in the early '90s, I guess I don’t understand the usage difficulties… Old days, I’d dive in, cruise the internals, of the unix based OS, but not to where I’d make changes, just curiosity, as in my own career in WeCo/Lucent, many times we had to delve into he core, unix based systems to sort out the failures we had to fix, it helped to dig around, see what the original coders, developers were intending in the parts of the program that were reporting an error… I’ve spent some time in the Terminal/Console/Activity monitor of my Mac to chase the errors it reports, but in the end few led to actual physical things needing fixing, so lately, I haven’t bothered… It just works, and even all the current applications haven’t failed me in years now. I’d like more features in Calendar, but that’s not up to me, there are alternatives out there, but I haven’t bothered to chase them down…
As I chase issues my DW has had, it’s generally just a missed setting, or other mysteries, but not the fault of the iOS or OS… On a retiree thread, one user has been dealing with his iPhone losing track of his location, BPS puts hime nowhere near where he actually is, if it were me, I’d be going to the local Store and working it over with one of the techs, or calling in to AppleCare, if a newish device… So much information is available if one looks, asks…
Unix systems are indeed pretty secure, it seems NATO agrees…
I’ve long been a believer in the security inherent in the Darwin underpinnings of all Apple OSes. My initial reaction to reading this news is that it will just bring more attention to Apple from hacking groups, particularly NATO adversaries.
But upon further reflection, it occurred to me that state-sponsored hacking groups have almost certainly had Apple operating systems in their sights for at least a decade, probably more than two. Likely some of them have already developed Advanced Persistent Threat (APT) platforms and need only revise them with each OS update, as needed.
From my perspective, what matters is not how secure Apple OSes are out of the box but how good APT monitoring is in the West. I’m assuming US and Israeli APT monitoring are pretty good. I’m less sure about NATO allies. I haven’t followed hacking threats in recent years, but it always kind of worried me that news of state-sponsored hacking platforms often came out of Kaspersky, based in Russia. It’s possible that US and Israeli monitors knew of those threats around the same time as Kaspersky but had the good sense not to advertise, or even let Kaspersky advertise instead.
-awlabrador