CRYPTANALYSIS OF A SCHEME MULTISIGNATURE DIGITIAL SIGNATURE
Wang Xiao-ming · Journal of Nankai University · 2003
In this paper, a forgery attack is proposed on Li-Yang's an ElGamal multisignature digitial signature scheme. Using this forgery attack, anyone of U_1,U_2,…,U_n signers can produce an U_1,U_2,…,U_n 's valid multisignature digitial sinature on message m . Furthermore, a new modified and secure multisignature digitial signature scheme is presented.