@misc{cryptoeprint:2020:173,
    author = {Dimitris Karakostas and Aggelos Kiayias},
    title = {Securing Proof-of-Work Ledgers via Checkpointing},
    howpublished = {Cryptology ePrint Archive, Report 2020/173},
    year = {2020},
    url = {https://eprint.iacr.org/2020/173},
}