@conference {723, title = {A Least Squares approach to user profiling in pool mix-based anonymous communication systems.}, booktitle = {IEEE International Workshop on Information Forensics and Security (WIFS)}, year = {2012}, month = {12/2012}, pages = {115{\textendash}120}, address = {Tenerife, Spain}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Carmela Troncoso} }