@misc{cryptoeprint:2017:211,
    author = {James Alderman and Keith M. Martin and Sarah Louise Renwick},
    title = {Multi-level Access in Searchable Symmetric Encryption},
    howpublished = {Cryptology ePrint Archive, Report 2017/211},
    year = {2017},
    url = {https://eprint.iacr.org/2017/211},
}