@misc{cryptoeprint:2011:455,
    author = {Jie Chen and Hoon Wei Lim and San Ling and Huaxiong Wang},
    title = {The Relation and Transformation between Hierarchical Inner Product Encryption and Spatial Encryption},
    howpublished = {Cryptology ePrint Archive, Report 2011/455},
    year = {2011},
    url = {http://eprint.iacr.org/2011/455},
}