The digital signature algorithm with message recovery proposed by Zhang Yun‐peng et al is analyzed , two errors are pointed out , the algorithm didn’t have the forward security , and one can recover message . An improvement algorithm is proposed , the correctness , security are proved .%对Zhang等提出的椭圆曲线消息恢复数字签名方案进行了分析，指出其验证方程存在错误，且方案无前向安全性，同时任意第三方可恢复消息。给出了一种改进方案，证明了改进方案具有抗伪造签名攻击、前向安全性、公开验证性和指定接收者消息恢复等性质，并对复杂度进行了分析。
展开▼
