Cryptology ePrint Archive: BibTeX Citation of Report 2012/712

@misc{cryptoeprint:2012:712,
    author = {Farzaneh Abed and Eik List and Stefan Lucks},
    title = {On the Security of the Core of PRINCE Against Biclique and Differential Cryptanalysis},
    howpublished = {Cryptology ePrint Archive, Report 2012/712},
    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.