Protecting User Privacy

Protecting users’ and privacy is a critical factor in building user trust. We’ve long required developers to limit their device permission requests to what’s necessary to provide the features of an app. Also, to help users understand how their is being used, we’ve required developers to provide prominent disclosures about the collection and use of sensitive user . Last year, we rejected or removed tens of thousands of that weren’t in compliance with ’s policies related to user data and privacy.

In October 2018, we announced a new policy restricting the use of the SMS and Call Log permissions to a limited number of cases, such as where an app has been selected as the user’s default app for making calls or sending text messages. We’ve recently started to remove apps from Play that violate this policy. We plan to introduce additional policies for device permissions and user data throughout 2019.

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Developer integrity

We find that over 80% of severe policy violations are conducted by repeat offenders and abusive developer networks. When malicious developers are banned, they often create new accounts or buy developer accounts on the black market in order to come back to Google Play. We’ve further enhanced our clustering and account matching technologies, and by combining these technologies with the expertise of our human reviewers, we’ve made it more difficult for spammy developer networks to gain installs by blocking their apps from being published in the first place.

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Harmful app contents and behaviors

As mentioned in last year’s blog post, we fought against hundreds of thousands of impersonators, apps with inappropriate content, and Potentially Harmful Applications (PHAs). In a continued fight against these types of apps, not only do we apply advanced machine learning models to spot suspicious apps, we also conduct static and dynamic analyses, intelligently use user engagement and feedback data, and leverage skilled human reviews, which have helped in finding more bad apps with higher accuracy and efficiency.

Despite our enhanced and added layers of defense against bad apps, we know bad actors will continue to try to evade our systems by changing their tactics and cloaking bad behaviors. We will continue to enhance our capabilities to counter such adversarial behavior, and work relentlessly to provide our users with a secure and safe app store.

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