@misc{cryptoeprint:2012:666,
    author = {Rock C. Liu and Zhiwi Yeh},
    title = {Estimating the $\phi(n)$ of Upper/Lower Bound in its RSA Cryptosystem},
    howpublished = {Cryptology ePrint Archive, Report 2012/666},
    year = {2012},
    url = {http://eprint.iacr.org/2012/666},
}