Improvement of Laih and Yen's multisignature scheme.
A new attack is proposed to show that a specified group of verifiers can cooperate to forge the signature for any message by secret key substitution due to the leaked secret key or by the group public key adjustment because of the renewed members. This paper presents the improvement scheme which overcomes the security weakness of Laih and Yen's scheme.
Xie
Qi
Q
Department of Mathematics, Zhejiang University, Hangzhou 310027, China. qixie@hztc.edu.cn
Yu
Xiu-yuan
XY
D003195:Computer Communication Networks; D016494:Computer Security; D016247:Information Storage and Retrieval / Q000379:methods*; D010363:Pattern Recognition, Automated / Q000379:methods*; D011996:Records; D012815:Signal Processing, Computer-Assisted