Progress in Cryptology - AFRICACRYPT 2019 11th International Conference on Cryptology in Africa, Rabat, Morocco, July 9-11, 2019, Proceedings - Buchmann, Johannes; Buchmann, Johannes; Nitaj, Abderrahmane; Nitaj, Abderrahmane; Rachidi, Tajjeeddine; Rachidi, Tajjeeddine (Springer International Publishing : Imprint: Springer, 2019)