Cryptology ePrint Archive: BibTeX Citation of Report 2012/611

@misc{cryptoeprint:2012:611,
    author = {Maura B. Paterson and Douglas R. Stinson and Jalaj Upadhyay},
    title = {A coding theory foundation for the analysis of general  unconditionally secure  proof-of-retrievability schemes for cloud storage},
    howpublished = {Cryptology ePrint Archive, Report 2012/611},
    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.