Cryptology ePrint Archive: BibTeX Citation of Report 2012/507

@misc{cryptoeprint:2012:507,
    author = {Josep Balasch and Baris Ege and Thomas Eisenbarth and Benoit Gérard and Zheng Gong and Tim Güneysu and Stefan Heyse and Stéphanie Kerckhof and François Koeune and Thomas Plos and Thomas Pöppelmann and Francesco Regazzoni and François-Xavier Standaert and Gilles Van Assche and Ronny Van Keer and Loïc van Oldeneel tot Oldenzeel and Ingo von Maurich  },
    title = {Compact Implementation and Performance Evaluation of Hash Functions in ATtiny Devices},
    howpublished = {Cryptology ePrint Archive, Report 2012/507},
    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.