"The iOS App Store is at a significant disadvantage there even compared to Google Play," [Tor developer Mike Perry] told us. "Each iOS app is re-encrypted specifically for the user with Apple's DRM, making it technically impossible to verify that the package you installed matches the official one." ... In order to solve the Android security mess, Google is taking steps that hurt user freedom, and make Android vulnerable to compelled backdoors, Perry argued. ... "Copperhead is also the only Android ROM that supports verified boot, which prevents exploits from modifying the boot, system, recovery, and vendor device partitions," ... "This makes Copperhead an excellent choice for our base system." <http://arstechnica.com/security/2016/11/tor-phone-prototype-google-hostility-android-open-source/>