@conference {DBLP:conf/networking/KollLSF14, title = {On the state of OSN-based Sybil defenses}, booktitle = {2014 {IFIP} Networking Conference, Trondheim, Norway, June 2-4, 2014}, year = {2014}, pages = {1{\textendash}9}, publisher = {{IEEE}}, organization = {{IEEE}}, doi = {10.1109/IFIPNetworking.2014.6857128}, url = {https://doi.org/10.1109/IFIPNetworking.2014.6857128}, author = {David Koll and Jun Li and Joshua Stein and Xiaoming Fu} }