Network Technology Research Center;
Institute of Computing Technology;
Chinese Academy of Sciences Beijing 100190;
China;
University of Chinese Academy of Sciences;
Beijing 100049;
China;
Global Energy Interconnection Research Institute Co.;
Ltd.;
Beijing 102209;
China;
LISTIC Laboratory of Computer Science;
Systems;
Information and Knowledge Processing;
UniversitéSavoie Mont Blanc;
Chambéry 73011;
France;
Computer Network Information Center;
Chinese Academy of Sciences;
Beijing 100190;
China;
community structure; fraud analysis; fraudulent keyword detection; web search;