Christelle Braun Konstantinos Chatzikokolakis Catuscia Palamidessi Compositional Methods for Information-Hiding. 443-457 2008 FoSSaCS http://dx.doi.org/10.1007/978-3-540-78499-9_31 conf/fossacs/2008 db/conf/fossacs/fossacs2008.html#BraunCP08