Cryptology ePrint Archive: BibTeX Citation of Report 2008/298

@misc{cryptoeprint:2008:298,
    author = {Ryou Fujita and Kohtaro Tadaki and Shigeo Tsujii},
    title = {Nonlinear Piece In Hand Perturbation Vector Method for Enhancing Security of Multivariate Public Key Cryptosystems},
    howpublished = {Cryptology ePrint Archive, Report 2008/298},
    year = {2008},
    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.