@misc{cryptoeprint:2014:994,
    author = {Riccardo Longo and Chiara Marcolla and Massimiliano Sala},
    title = {Key-Policy Multi-authority Attribute-Based Encryption},
    howpublished = {Cryptology ePrint Archive, Report 2014/994},
    year = {2014},
    url = {https://eprint.iacr.org/2014/994},
}