@misc{cryptoeprint:2011:254,
    author = {T. Kleinjung and A.K. Lenstra and D. Page and N.P. Smart},
    title = {Using the Cloud to Determine Key Strengths},
    howpublished = {Cryptology ePrint Archive, Report 2011/254},
    year = {2011},
    url = {http://eprint.iacr.org/2011/254},
}