Cryptography professor warns about Android security, says some of it is six years behind the iPhone
The sole reason for so many Android security news, however, is that Android's encryption is still not up to par, even the latest 7.0 Nougat version, reveals a cryptography professor from Johns Hopkins university.
Android struggling to deploy encryption that Apple figured out 2010According to Matthew Green, while Nougat devices have moved away from the full-disk encryption (FDE) of yesteryear that is easier to hack, and employ file-level protection if you set a passcode, there are scenarios where you can still access some files directly as the encryption keys are being stored in memory.
Apparently, while Apple provides no less than four protection levels for developers to choose from, Android N has only two, and even if it adds more down the road, this will still leave millions of legacy apps somewhat vulnerable. In a nutshell, the cryptography professor's disheartening conclusion is that the current state of Android's security is only good for Google to keep the FBI at arm's length.
source: Matthew Green (Cryptography Engineering)