Apple confirms iOS 10 kernel code left unencrypted intentionally to improve OS performance and ensures that it will have no impact on security. The move is strange, considering the previous release implemented several levels of protection to prevent the analysis of the heart of the mobile OS. Apple declined to explain the change when contacted on Tuesday, but after the issue gained wider attention, the company released a statement Wednesday saying it had intentionally left the kernel unencryptedbut not for security reasons. Apple will not encrypt the kernel of iOS 10 because it doesnt include sensitive information of the users.”]
Source: http://securityaffairs.co/wordpress/48688/mobile-2/ios-10-kernel-unencrypted.html