@misc{cryptoeprint:2015:249,
    author = {Keita Xagawa},
    title = {Improved (Hierarchical) Inner-Product Encryption from Lattices},
    howpublished = {Cryptology ePrint Archive, Report 2015/249},
    year = {2015},
    url = {https://eprint.iacr.org/2015/249},
}