Digital Multisignature Schemes Based on Schnorr Algorithm

Because most part of the calculation can be handled at preprocessing phase,identification and signature schemes based on Schnorr algorithm has high efficiency,its security is based on the difficulty of the discrete logarithms problem.According to this algorithm,by adopting identification code and time-limited methods in the signature,this paper presents two multisignature schemes which can prevent repeat broadcast attack and malicious delay in the process.In the end,it analyses the two schemes’ security and efficiency.