Cryptology ePrint Archive: BibTeX Citation of Report 2010/339

@misc{cryptoeprint:2010:339,
    author = {Jose Bacelar Almeida and Endre Bangerter and Manuel Barbosa and Stephan Krenn and Ahmad-Reza Sadeghi and Thomas Schneider},
    title = {A Certifying Compiler for Zero-Knowledge Proofs of Knowledge Based on $\Sigma$-Protocols},
    howpublished = {Cryptology ePrint Archive, Report 2010/339},
    year = {2010},
    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.