Stavros Papadopoulos Yin Yang Dimitris Papadias CADS: Continuous Authentication on Data Streams. 135-146 2007 conf/vldb/2007 VLDB http://www.vldb.org/conf/2007/papers/research/p135-papadopoulos.pdf db/conf/vldb/vldb2007.html#PapadopoulosYP07