Manuel Barbosa Bernardo Ferreira João C. Marques Bernardo Portela Nuno M. Preguiça Secure Conflict-free Replicated Data Types. 6-15 2021 ICDCN https://doi.org/10.1145/3427796.3427831 conf/icdcn/2021 db/conf/icdcn/icdcn2021.html#BarbosaFMPP21