Cryptology ePrint Archive: BibTeX Citation of Report 2001/066

@misc{cryptoeprint:2001:066,
    author = {SEONG-HUN PAENG and DAESUNG KWON and KIL-CHAN HA and JAE HEON KIM},
    title = {IMPROVED PUBLIC KEY CRYPTOSYSTEM USING FINITE NON ABELIAN GROUPS},
    howpublished = {Cryptology ePrint Archive, Report 2001/066},
    year = {2001},
    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.