Cryptology ePrint Archive: BibTeX Citation of Report 1997/010

@misc{cryptoeprint:1997:010,
    author = {Erez Petrank and Charles Rackoff },
    title = {CBC MAC for Real-Time Data Sources },
    howpublished = {Cryptology ePrint Archive, Report 1997/010},
    year = {1997},
    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.