@misc{cryptoeprint:2004:212,
    author = {Danfeng Yao and Nelly Fazio and Yevgeniy Dodis and Anna Lysyanskaya},
    title = {ID-Based Encryption for Complex Hierarchies with Applications to Forward Security and Broadcast Encryption},
    howpublished = {Cryptology ePrint Archive, Report 2004/212},
    year = {2004},
    url = {http://eprint.iacr.org/2004/212},
}