You must have heard about the case between FBI and Applem. iOS is currently one of the most secure operating systems in the world, which of course the FBI doesn't like. They want Apple he created a backdoor in his system through which she could get into the iPhone. Apple does not agree with the request. According to the latest statistics, very few Android mobile phones are encrypted. Server wsj.com brought interesting statistics that confirm the mentioned statement. Roughly 95% of all iPhones are encrypted, while Android only encrypts 2% of all devices.
The reason is quite simple, Google did not encrypt the entire storage until Android 6.0. However, version 6.0 already encrypts it, but the bad news is that Android 6.0 has a very low market share, as it is installed on a small number of mobile phones. It is possible that Google system security iOS is jealous, so in the latest version of Android, it has redesigned the security protocol. It now divides the mobile operating system into two parts: the operating system core and the user interface, which the user can modify.
Apple started encrypting the entire storage along with the operating system iOS 8. The older system is also secure, but it is reportedly breakable. If you have iOS 8 or iOS 9, don't worry, it's almost over 100% certainty that safety won't even crack the FBI.
*Source: Bgr.com
Google separates the kernel more as an effort to solve the problem of system fragmentation. Google could update the system without manufacturers having to redo their superstructures.