Arnab Roy Anupam Datta Ante Derek John C. Mitchell Inductive Proofs of Computational Secrecy. 219-234 2007 conf/esorics/2007 ESORICS http://dx.doi.org/10.1007/978-3-540-74835-9_15 db/conf/esorics/esorics2007.html#RoyDDM07