@INPROCEEDINGS{6596056, author={Costin, A and Isacenkova, J. and Balduzzi, M. and Francillon, A and Balzarotti, D.}, booktitle={Privacy, Security and Trust (PST), 2013 Eleventh Annual International Conference on}, title={The role of phone numbers in understanding cyber-crime schemes}, year={2013}, month={July}, pages={213-220}, keywords={Internet;computer crime;graph theory;telephone sets;HLR lookups;Internet;advanced spam heuristics;blacklists;criminal activities;cyber-crime schemes;cyber-criminal business models;defensive mechanisms;geographical home location register lookups;graph analysis;online threats;phone numbers analysis;telephones;Business;Communities;Data mining;Electronic mail;Mobile communication;Mobile handsets;Reliability}, doi={10.1109/PST.2013.6596056},}