There have been recurring questions about Google's long-term interest in Android ever since the Guardian last month that Android generated less than $550 million in total revenues for the company from its launch in 2008 through the end of 2011. What's more, the Guardian found that Google actually generated more than four times the revenue from having its services on the than it did from having its services spread out across Android devices.

Android is currently the most popular mobile operating system in the world, as research firm Gartner reported late last year that Android devices accounted for more than half of all sold worldwide in the third quarter of 2011. Since its debut in the fall of 2007, Android has appeared on numerous popular smartphones for several carriers including Verizon's Motorola Droid and Sprint's HTC Evo 4G. Google now claims that it activates in excess of 850,000 Android devices every day.

As an open-source operating system that is free for device manufacturers to use, Android has been adopted by a wide range of handset makers including HTC, Motorola, LG, Samsung and Sony-Ericsson. Late last year Google unveiled Android 4.0 (a.k.a. "Ice Cream Sandwich"), which was the first version of the Android platform that was designed to work the same on both tablet and smartphone form factors.

in Network World's Anti-malware section.