Kamel Bentahar Pooya Farshim John Malone-Lee Nigel P. Smart Generic Constructions of Identity-Based and Certificateless KEMs. 178-199 2008 21 J. Cryptology 2 http://dx.doi.org/10.1007/s00145-007-9000-z db/journals/joc/joc21.html#BentaharFMS08