Nikita Borisov George Danezis Prateek Mittal Parisa Tabriz Denial of service or denial of security? 92-102 2007 ACM Conference on Computer and Communications Security http://doi.acm.org/10.1145/1315245.1315258 conf/ccs/2007 db/conf/ccs/ccs2007.html#BorisovDMT07