@misc{cryptoeprint:2017:227,
    author = {Hubert Ritzdorf and Claudio Soriente and Ghassan O. Karame and Srdjan Marinovic and Damian Gruber and Srdjan Capkun},
    title = {Towards Shared Ownership in the Cloud},
    howpublished = {Cryptology ePrint Archive, Report 2017/227},
    year = {2017},
    url = {https://eprint.iacr.org/2017/227},
}