@misc{cryptoeprint:2015:1131,
    author = {Ding Wang  and Ping Wang},
    title = {On the Usability of Two-Factor Authentication},
    howpublished = {Cryptology ePrint Archive, Report 2015/1131},
    year = {2015},
    url = {https://eprint.iacr.org/2015/1131},
}