@misc{cryptoeprint:2018:838, author = {Keita Xagawa and Takashi Yamakawa}, title = {(Tightly) QCCA-Secure Key-Encapsulation Mechanism in the Quantum Random Oracle Model}, howpublished = {Cryptology ePrint Archive, Report 2018/838}, year = {2018}, url = {https://eprint.iacr.org/2018/838}, }