Apple announcement:
…iPhone and iPad are the first and only consumer devices in compliance with the information assurance requirements of NATO nations. This enables iPhone and iPad to be used with classified information up to the NATO restricted level without requiring special software or settings—a level of government certification no other consumer mobile device has met.
This is out of the box, no modifications required.
Boing Boing post.
Tags: Apple, cyberespionage, data protection, iPad, iPhone, smartphones