This case study concerns the non-repudiation protocol of Markowitch & Roggeman [MR99]. The models here are partially observable probabilistic timed automata (POPTAs), as described in [NPZ17]. These extend the the probabilistic timed automaton (PTA) version from [NPS13], the files for which can be found in ../../ptas/repudiation. Both are extensions of the PTA model developed in [LMST04]. For more information, see: http://www.prismmodelchecker.org/casestudies/nonrepudiation.php ===================================================================================== PARAMETERS: K: the originator randomly selects an integer over the range 1,...,K ===================================================================================== [LMST04] R. Lanotte, A. Maggiolo-Schettini and A. Troina Automatic Analysis of a Non-Repudiation Protocol In Proc. 2nd International Workshop on Quantitative Aspects of Programming Languages (QAPL'04), 2004 (available as ENTCS, vol. 112, pp. 113–129, 2005) [MR99] O. Markowitch and Y. Roggeman Probabilistic non-repudiation without trusted third party In Proc. 2nd Workshop on Security in Communication Networks, 1999 [NPS13] Gethin Norman, David Parker and Jeremy Sproston Model Checking for Probabilistic Timed Automata Formal Methods in System Design, 43(2), pages 164-190, Springer, 2013 [NPZ17] Gethin Norman, David Parker and Xueyi Zou Verification and Control of Partially Observable Probabilistic Systems Real-Time Systems, 53(3), pages 354-402, Springer, 2017