Cryptology ePrint Archive: BibTeX Citation of Report 2006/274

@misc{cryptoeprint:2006:274,
    author = {Debasis  Giri and P. D. Srivastava},
    title = {An Improved Remote User Authentication Scheme with Smart Cards using Bilinear Pairings},
    howpublished = {Cryptology ePrint Archive, Report 2006/274},
    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.