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Google the Open Handset Alliance.

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Manufacturers and the Android developers community have made many efforts in order to improve Android

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security.

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However, the emergence and evolution of new security threats continue being an important issue in general.

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Android is not only an OS but a platform of three main building blocks.

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The device hardware, the Android operating system and the application runtime.

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First of all, the Android device hardware block refers to the wide range of hardware configurations

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where Android can be run.

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This includes smartphones, tablets, watches, auto mobiles, smart DVDs or tichy gaming boxes and

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setup boxes.

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Android is processor agnostic.

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Secondly, the Android operating system building block refers to the Android operating system itself,

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which is built on top of the Linux kernell.

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Thus, all device resources are accessed through the operating system.

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Thirdly, the Android application runtime block refers to the managed runtime used by the application

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and some system services on Android.