关键词：社交网络；垃圾邮件检测；地下经济；Twitter
摘 要：In this dissertation, we empirically analyze in both breadth and depth the range of threats currently targeting online social networks through the lens of Twitter. We map out the support infrastructure that is critical to online social network abuse, characterize the tools and techniques used to disseminate malignant content, and evaluate how such attacks ultimately realize a pro t for the attackers involved. To aid in this e ort, we develop two new strategies for preventing abuse in social networks.