Cryptology ePrint Archive: BibTeX Citation of Report 2007/026

@misc{cryptoeprint:2007:026,
    author = {Shengbao Wang and Zhenfu Cao and Maurizio Adriano Strangio and Lihua Wang},
    title = {Cryptanalysis and Improvement of an Elliptic Curve Diffie-Hellman Key Agreement Protocol},
    howpublished = {Cryptology ePrint Archive, Report 2007/026},
    year = {2007},
    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.