Users can install applications from online stores, physical stores,company websites, or “official” application marketplaces like the Apple App Store. The type of application download source influences the availability of security-relevant information prior to installation. For example, official application marketplaces list user reviews, salespeople work at physical stores, and company websites only provide favorable information about their applications.
We are particularly interested in official marketplaces and large online stores because they have the potential to be augmented with additional information about privacy and security.