Cryptology ePrint Archive: BibTeX Citation of Report 2012/445

@misc{cryptoeprint:2012:445,
    author = {Debiao He, Jianhua Chen, Miaomiao Tian},
    title = {A note on ‘An efficient certificateless aggregate signature with constant pairing computations’ },
    howpublished = {Cryptology ePrint Archive, Report 2012/445},
    year = {2012},
    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.