【摘要】 授权签名可以控制签名代理者、验证时间和验证者,不少著名的方案都可以归类为shcnorr授权签名,以强代理签名方案为例分析了最近的一些攻击,并提出改进的办法。针对电子政务的实际应用需求,以改进的签名算法作为理论基础,设计了适合社区的信息交换管理模型,能提高电子政务系统的安全性和管理效率。更多还原

【Abstract】 Delegation signature schemes have the capability of controlling a signature for the proxy signer in signing,the time and the verifier in validating,and many of them can be classed into Schnorr-typed delegation signature.Using strong proxy signature as an instance in point,a common attack is analyzed and an improvement is made.To satisfy the practical requirement in E-government,a management model for information exchange among communities is proposed based on the new scheme,which can enhance the security and efficiency at the same time.更多还原