【摘要】 对具有消息恢复的数字签名方案提出了两种攻击方法.此外,对原方案进行了改进,通过对改进方案的安全性分析得出结论:改进方案比原方案更安全,并且消息恢复过程只需要计算一次大数模幂乘和两次单向函数.更多还原

【Abstract】 The new message recovery signature scheme proposed by Li and Yang is not secure against recovery equation attack, and two kinds of attacks are presented in this paper. Furthermore, the scheme is improved, and it is shown that the improved scheme is more secure than the original by analyzing the security of the improved scheme, and has only one exponentiation modulo p and two hash-function evaluations for verification.更多还原