Cryptology ePrint Archive: BibTeX Citation of Report 2006/124

@misc{cryptoeprint:2006:124,
    author = {K.W. Wong and Edward C.W. Lee and L.M. Cheng and Xiaofeng Liao},
    title = {Fast Elliptic Scalar Multiplication using New Double-base Chain and Point Halving},
    howpublished = {Cryptology ePrint Archive, Report 2006/124},
    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.