Cryptology ePrint Archive: BibTeX Citation of Report 2005/412

@misc{cryptoeprint:2005:412,
    author = {Tsz Hon Yuen and Victor K. Wei},
    title = {Constant-Size Hierarchical Identity-Based Signature/Signcryption without Random Oracles},
    howpublished = {Cryptology ePrint Archive, Report 2005/412},
    year = {2005},
    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.