@misc{cryptoeprint:2015:1230,
    author = {Foteini Baldimtsi and Aggelos Kiayias and Thomas Zacharias and Bingsheng Zhang},
    title = {Indistinguishable Proofs of Work or Knowledge},
    howpublished = {Cryptology ePrint Archive, Report 2015/1230},
    year = {2015},
    url = {https://eprint.iacr.org/2015/1230},
}