@misc{cryptoeprint:2015:453,
    author = {Yupu Hu and Huiwen Jia},
    title = {An Optimization of Gu Map-1},
    howpublished = {Cryptology ePrint Archive, Report 2015/453},
    year = {2015},
    url = {https://eprint.iacr.org/2015/453},
}