Public-Key Cryptography - PKC 2019 22nd IACR International Conference on Practice and Theory of Public-Key Cryptography, Beijing, China, April 14-17, 2019, Proceedings, Part I - Lin, Dongdai; Lin, Dongdai; Sako, Kazue; Sako, Kazue (Springer International Publishing : Imprint: Springer, 2019)