Yvonne Hitchcock Colin Boyd Juan Manuel González Nieto Modular proofs for key exchange: rigorous optimizations in the Canetti-Krawczyk model. 405-438 2006 16 Appl. Algebra Eng. Commun. Comput. 6 http://dx.doi.org/10.1007/s00200-005-0185-9 db/journals/aaecc/aaecc16.html#HitchcockBN06