@misc{cryptoeprint:2019:644,
    author = {Aydin Abadi and Michele Ciampi and Aggelos Kiayias and Vassilis Zikas},
    title = {Timed Signatures and Zero-Knowledge Proofs -Timestamping in the Blockchain Era-},
    howpublished = {Cryptology ePrint Archive, Report 2019/644},
    year = {2019},
    url = {https://eprint.iacr.org/2019/644},
}