Radha Jagadeesan Alan Jeffrey Corin Pitcher James Riely Towards a Theory of Accountability and Audit. 152-167 2009 ESORICS http://dx.doi.org/10.1007/978-3-642-04444-1_10 conf/esorics/2009 db/conf/esorics/esorics2009.html#JagadeesanJPR09