@inproceedings {179494, title = {How the Great Firewall of China is Blocking Tor}, booktitle = {2nd USENIX Workshop on Free and Open Communications on the Internet (FOCI 12)}, year = {2012}, address = {Bellevue, WA}, url = {https://www.usenix.org/conference/foci12/workshop-program/presentation/Winter}, publisher = {USENIX Association}, month = aug }