@misc{cryptoeprint:2004:090,
    author = {Ratna Dutta and Rana Barua and and Palash Sarkar},
    title = {Provably Secure Authenticated Tree Based Group Key Agreement Protocol},
    howpublished = {Cryptology ePrint Archive, Report 2004/090},
    year = {2004},
    url = {http://eprint.iacr.org/2004/090},
}