Cryptology ePrint Archive: BibTeX Citation of Report 2015/655

@misc{cryptoeprint:2015:655,
    author = {Nizamud Din, Arif Iqbal Umar, Abdul Waheed, Noor Ul Amin},
    title = {An Efficient Multi-Message Multi-Receiver Signcryption Scheme with Forward Secrecy on Elliptic Curves},
    howpublished = {Cryptology ePrint Archive, Report 2015/655},
    year = {2015},
    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.