Apple’s new iOS 10 made headlines after MIT Technology Review revealed that the company had left the kernel of the mobile operating system unencrypted. The kernel is responsible for things like security and how applications are capable of accessing parts of an iPhone or iPad. Apple has always kept the kernel under several layers of protection in previous versions of iOS, leaving developers as well as security researchers in the dark. If more eyes are looking for flaws, it would be easier to discover and patch the issues more quickly than before.
Source: https://thehackernews.com/2016/06/apple-ios-kernel.html