Cryptanalysis and improvement of a certificateless signature scheme
Chuanda Qi · Journal of Computer Applications · 2013
Security analysis of the certificateless signature scheme proposed by Guo L L,et al.(Guo L L,Lin C L,Zhang S Y.Attack and improvement for certificateless signature scheme.Computer Engineering,2012,38(16): 134-137,141) showed that the scheme was insecure against public key replacement attack.An improved scheme which can resist public key replacement attack was proposed.The scheme was proved to be existentially unforgeable against adaptive chosen message and identity attacks in random oracle model,and the security was reduced to computational Diffie-Hellman assumption.Compared with other certificateless signature schemes based on bilinear pairing,the improved scheme has better computational efficiency.