Cryptology ePrint Archive: BibTeX Citation of Report 2015/1012

@misc{cryptoeprint:2015:1012,
    author = {Harish Karthikeyan and Suvradip Chakraborty and Kunwar Singh and C. Pandu Rangan},
    title = {An Efficient Multiple PKG Compatible Identity Based Key Agreement for Vehicular Networks},
    howpublished = {Cryptology ePrint Archive, Report 2015/1012},
    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.