Cryptology ePrint Archive: BibTeX Citation of Report 2006/279

@misc{cryptoeprint:2006:279,
    author = {Sanjit Chatterjee and Palash Sarkar},
    title = {On (Hierarchical) Identity Based Encryption Protocols with Short Public Parameters \\ (With an Exposition of Waters' Artificial Abort Technique)},
    howpublished = {Cryptology ePrint Archive, Report 2006/279},
    year = {2006},
    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.