@misc{cryptoeprint:2006:344,
    author = {Lihua Wang and Takeshi Okamoto and Masahiro Mambo and Eiji Okamoto},
    title = {A Subject-Delegated Decryption Scheme with ``Tightly" Limited Authority},
    howpublished = {Cryptology ePrint Archive, Report 2006/344},
    year = {2006},
    url = {http://eprint.iacr.org/2006/344},
}