@misc{cryptoeprint:2010:649,
    author = {Douglas Stebila and Lakshmi Kuppusamy and Jothi Rangasamy and Colin Boyd and Juan Gonzalez Nieto},
    title = {Stronger difficulty notions for client puzzles and denial-of-service-resistant protocols},
    howpublished = {Cryptology ePrint Archive, Report 2010/649},
    year = {2010},
    url = {http://eprint.iacr.org/2010/649},
}