@misc{cryptoeprint:2017:824,
    author = {Ela Berners-Lee},
    title = {Improved Security Notions for Proxy Re-Encryption to Enforce Access Control},
    howpublished = {Cryptology ePrint Archive, Report 2017/824},
    year = {2017},
    url = {https://eprint.iacr.org/2017/824},
}