George Danezis Claudia Díaz Emilia Käsper Carmela Troncoso The Wisdom of Crowds: Attacks and Optimal Constructions. 406-423 2009 ESORICS http://dx.doi.org/10.1007/978-3-642-04444-1_25 conf/esorics/2009 db/conf/esorics/esorics2009.html#DanezisDKT09