@misc{cryptoeprint:2018:728,
    author = {Takeshi Okamoto and Raylin Tso and Michitomo Yamaguchi and  Eiji Okamoto},
    title = {A $k$-out-of-$n$ Ring Signature with Flexible Participation for Signers},
    howpublished = {Cryptology ePrint Archive, Report 2018/728},
    year = {2018},
    url = {https://eprint.iacr.org/2018/728},
}