Cryptology ePrint Archive: BibTeX Citation of Report 2004/366

@misc{cryptoeprint:2004:366,
    author = {Shigeo Tsujii and Kohtaro Tadaki and Ryou Fujita},
    title = {Piece In Hand Concept for Enhancing the Security of Multivariate Type Public Key Cryptosystems: Public Key Without Containing All the Information of Secret Key},
    howpublished = {Cryptology ePrint Archive, Report 2004/366},
    year = {2004},
    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.