@misc{cryptoeprint:2021:376,
    author = {Nai-Hui Chia and Kai-Min Chung and Qipeng Liu and Takashi Yamakawa},
    title = {On the Impossibility of Post-Quantum Black-Box Zero-Knowledge in Constant Rounds},
    howpublished = {Cryptology ePrint Archive, Report 2021/376},
    year = {2021},
    url = {https://eprint.iacr.org/2021/376},
}