Analysis and Improvement of a Privacy-Preserving Authentication Scheme for Telecare Medical Information System EnvironmentShufang NIU, Baoyuan KANG, Anqian LI, Yuyan HUO and Xinyu ZUOWuhan Univ. J. Nat. Sci., 28 6 (2023) 531-540DOI: https://doi.org/10.1051/wujns/2023286531