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Google’s cleaning up the Play Store, using machine learning to remove 700,000 bad apps

Earlier this month, removed some 60 games from the Store after it was uncovered that the so-called Adult Swine bug was delivering inappropriate and malicious ads to kids. According to , that’s just a drop in the bucket compared to the 700,000 it booted from the Store in 2017.

In a blog post titled, “How we fought bad and malicious developers in 2017,” Google spotlights the numerous ways it has stayed ahead of bad Store over the past 12 months. In addition to the 700,000 it took down in 2017—a 70-percent increase over 2016’s numbers—Google also says it was able to identify and root them out much quicker: The company boasts that 99 percent of “with abusive contents” were tossed from the Store before anyone could install them. Google also says it has developed new detection techniques to weed out repeat offenders and identify “abusive developer networks at scale” to stop them from simply submitting another set of bad apps.

According to Google, the biggest reason for the jump in removed applications was machine learning. Google used its AI-powered engine to help “detect abusive app content and behaviors—such as impersonation, inappropriate content, or malware” which then helped the human reviewers detect problematic apps. Among the apps that were removed were:

Copycats: Apps that attempt to deceive users by emulating a popular app. Google says more than 250,000 of the 700,000 targeted apps were copycats.Inappropriate content: Apps that promote pornography, extreme violence, hate, and illegal activities.Potentially Harmful Applications: Apps that can harm your device, including phishing and fraudulent apps. Google says PHAs are “small in volume” in the Play Store mostly due to provisions that are already in place. For example, the launch of Google Play Protect “reduced the rate of PHA installs by an order of magnitude compared to 2016.”

However, Google admits there is more work to be done, as evidenced by the Adult Swine bug: “Despite the new and enhanced detection capabilities that led to a record-high takedowns of bad apps and malicious developers, we know a few still manage to evade and trick our layers of defense.”

The impact on you at home: Google developed a bad reputation over the years for being too lenient with its App Store review policies, and the company has worked hard to shake that image. Particularly, its claim that 99 percent of malicious and fraudulent apps were zapped before anyone could install them is impressive, though for affected users, even 1 percent is too high. However, the bigger issue here is protection against apps that aren’t download
ed through the Play Store. The vast majority of malware is contracted via third-party app stores and side-loaded apps, a much harder area for Google to police, even with the help of machine learning. 

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