1. TOWARDS TRUSTWORTHY RATING SYSTEMS FOR MOBILE APP STORES Open Access Author: Xie, Zhen Title: TOWARDS TRUSTWORTHY RATING SYSTEMS FOR MOBILE APP STORES Graduate Program: Computer Science Keywords: MobileApp storecollusion groupabused appbiclique communityGroupTieAppWacther File: Download XieZhen-Dissertation.pdf Committee Members: Sencun Zhu, Dissertation Advisor/Co-AdvisorSencun Zhu, Committee Chair/Co-ChairGuohong Cao, Committee MemberGeorge Kesidis, Committee MemberZhen Lei, Outside Member