@misc{cryptoeprint:2013:382,
    author = {Yevgeniy Dodis and Thomas Ristenpart and John Steinberger and Stefano Tessaro},
    title = {To Hash or Not to Hash Again? (In)differentiability Results for H^2 and HMAC},
    howpublished = {Cryptology ePrint Archive, Report 2013/382},
    year = {2013},
    url = {https://eprint.iacr.org/2013/382},
}