Haifeng Qian Zhenfu Cao Licheng Wang Sheng Guo Cryptanalysis of Chang-Lin-Lam's ID-based Multisignature Scheme. 113-116 2006 conf/imsccs/2006-2 IMSCCS (2) http://doi.ieeecomputersociety.org/10.1109/IMSCCS.2006.206 db/conf/imsccs/imsccs2006-2.html#QianCWG06