Cryptology ePrint Archive: BibTeX Citation of Report 2006/152

@misc{cryptoeprint:2006:152,
    author = {G. Shailaja and K. Phani Kumar and Ashutosh Saxena},
    title = {Pairing based Mutual Authentication Scheme Using Smart Cards},
    howpublished = {Cryptology ePrint Archive, Report 2006/152},
    year = {2006},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.