@misc{cryptoeprint:2021:539,
    author = {Atsushi Takayasu},
    title = {More Efficient Adaptively Secure Revocable Hierarchical Identity-based Encryption with Compact Ciphertexts: Achieving Shorter Keys and Tighter Reductions},
    howpublished = {Cryptology ePrint Archive, Report 2021/539},
    year = {2021},
    url = {https://eprint.iacr.org/2021/539},
}