Cryptology ePrint Archive: BibTeX Citation of Report 2005/276

@misc{cryptoeprint:2005:276,
    author = {Jung Hee Cheon and Dong Hoon Lee},
    title = {Use of Sparse and/or Complex Exponents in Batch Verification of Exponentiations},
    howpublished = {Cryptology ePrint Archive, Report 2005/276},
    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.