@misc{cryptoeprint:2021:416,
    author = {Florian Breuer and Vipul Goyal and Giulio Malavolta},
    title = {Cryptocurrencies with Security Policies and Two-Factor Authentication},
    howpublished = {Cryptology ePrint Archive, Report 2021/416},
    year = {2021},
    url = {https://eprint.iacr.org/2021/416},
}