Inside Android 4.2's powerful new security system
ComputerWorld:
Android 4.2 marks the launch of a powerful new security system built right into the platform. The key component is a real-time app scanning service that instantly checks apps put on your device for any malicious or potentially harmful code.
Nice, now you will have an Anti Virus on your Android device, if you buy a device with Android 4.2, or you get the update. But mostly if you buy a device with Android 4.2, the update might not get there.