【摘要】 针对Wang等提出的基于格中困难问题的环签名方案不满足不可伪造性的问题,提出了一种改进的环签名方案.该方案在随机谕言模型下满足全密钥暴露下的匿名性和内部攻击下的不可伪造性.而且使用一种强陷门生成算法,保证了新的签名方案简单、高效且容易实施.更多还原

【Abstract】 Wang has proposed a ring signature scheme based on difficult problem in lattices,but it does not satisfy unforgeability against insider corruption.Hereby we present a ring signature scheme which is anonymous against full key exposure and unforgeable against insider corruption in the random oracle model.In our new signature schemes,we use strong trapdoor generation algorithms.Consequently,it is simple and efficient for proposed algorithms to be implemented.更多还原