Cryptology ePrint Archive: BibTeX Citation of Report 2015/490

@misc{cryptoeprint:2015:490,
    author = {Sonam Devgan Kaul and Amit K. Awasthi},
    title = {Cryptanalysis Of Dynamic ID Based Remote User Authentication Scheme With Key Agreement},
    howpublished = {Cryptology ePrint Archive, Report 2015/490},
    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.