@misc{cryptoeprint:2020:1299,
    author = {Yunxiu Ye and Zhenfu Cao and Jiachen Shen},
    title = {Unbounded Key-Policy Attribute-based Encryption with Black-Box Traceability},
    howpublished = {Cryptology ePrint Archive, Report 2020/1299},
    year = {2020},
    url = {https://eprint.iacr.org/2020/1299},
}