Mudhakar Srivatsa Shane Balfe Kenneth G. Paterson Pankaj Rohatgi Trust management for secure information flows. 175-188 2008 ACM Conference on Computer and Communications Security http://doi.acm.org/10.1145/1455770.1455794 conf/ccs/2008 db/conf/ccs/ccs2008.html#SrivatsaBPR08