Cryptology ePrint Archive: BibTeX Citation of Report 2012/337

@misc{cryptoeprint:2012:337,
    author = {Sanjay Bhattacherjee and Palash Sarkar},
    title = {Analysis and Trade-Offs for the (Complete Tree) Layered Subset Difference Broadcast Encryption Scheme},
    howpublished = {Cryptology ePrint Archive, Report 2012/337},
    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.