Cryptanalysis of Zhou et al.'s proxy-protected signature schemes.

Je Hong Park Bo Gyeong Kang Jae Woo Han Cryptanalysis of Zhou et al.'s proxy-protected signature schemes. 192-197 2005 169 Applied Mathematics and Computation 1 http://dx.doi.org/10.1016/j.amc.2004.10.051 db/journals/amc/amc169.html#ParkKH05