Proposes Mobile Trusted-Origin Policy to authenticate mobile apps accessing network APIs by annotating HTTP requests with app provenance, preventing click fraud and API abuse through code isolation and origin verification.
Presents MAdFraud, analyzing 130,339 apps to detect mobile ad fraud including background ad requests (30% of apps) and 27 apps with automated clicking, revealing stealthy techniques to evade detection.
First large-scale study characterizing plagiarized Android apps across 265,359 applications from 17 markets and estimating their economic impact by analyzing advertising revenue siphoned from original developers using tier-1 cellular network traces.