Cryptanalysis of two certificateless partially blind signature schemes
Zhanqing Wang · Jisuanji yingyong yanjiu · 2011
This paper analyzed two certificateless partially blind signature schemes.It indicated that the two certificateless partially blind signature schemes were insecure.For the one scheme,a type Ⅱ adversary,i.e.malicious private key generator(KGC),can generate the trapdoor system parameters using the identity of a chosen potential user in the Setup phase and forge a signature of the user on any message in the Signing phase.For the other scheme,a type I adversary can forge a signature of any user on any message by substituting the user's public key.