Abstract
- Advertising networks bring companies together that run advertisements on websites or within apps. Targeting capabilities of the advertisers have increased drastically over the last years due to the availability user data and advances in data science: Whether users log on to social networks or use a mobile app, they leave their traces everywhere and leave valuable data for analysis. However, even in the background and unconsciously to many users, personal data is stored and processed by third parties. This data is used to get to know potential customers better and to align the appropriate advertising with them automatically. This work analyzes selected advertising networks in Android apps concerning their data collection behavior. Therefore a selection of 100 apps from the Google Play store has been analyzed on their contained advertising networks. The Network traffic originating from the given apps as well as the app behavior has been analysed. It is pointed out which data is collected and transferred. The results are quite surprising stating that the top app comprising 14 advertising networks. The conformity and completeness of the information provided in the data privacy declarations will also be assessed.