Cryptology ePrint Archive: BibTeX Citation of Report 2014/581

@misc{cryptoeprint:2014:581,
    author = {Olivier Blazy and Eike Kiltz and Jiaxin Pan},
    title = {(Hierarchical) Identity-Based Encryption from Affine Message Authentication},
    howpublished = {Cryptology ePrint Archive, Report 2014/581},
    year = {2014},
    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.