Cryptology ePrint Archive: BibTeX Citation of Report 2005/372

@misc{cryptoeprint:2005:372,
    author = {Dao-Shun Wang, Lei Zhang, Ning Ma and Lian-Sheng Huang},
    title = {Secret color images sharing schemes based on XOR operation},
    howpublished = {Cryptology ePrint Archive, Report 2005/372},
    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.