一种基于前向安全的可公开验证签密方案  

A SIGNCRYPTION SCHEME WITH PUBLIC VERIFIABILITY BASED ON FORWARD SECURITY

作　　者：于永[1] 綦朝晖[1] 

机构地区：[1]石家庄铁道学院计算机与信息工程分院,河北石家庄050043

出　　处：《计算机应用与软件》2010年第1期283-285,共3页Computer Applications and Software

摘　　要：提出一种具有公开验证性和前向安全性的签密方案,弥补了已有签密方案大多数不能同时提供可公开验证性和前向安全性的不足。该方案中,只有指定接收者可以从签密密文中恢复出签密消息的明文;在公开验证中不需要接收者的私钥及消息明文;并且具备前向安全性,即使签密者的私钥泄露,攻击者也不能恢复本次及以前所签密消息的明文。同时该方案改变了传统上使用Hash函数或Redundancy函数的验证方法。最后对该方案的安全性进行了详细分析。A signcryption scheme with both public verifiability and forward security is presented in this paper,which makes up the shortcoming of existing schemes,most of them can not simultaneously provide with public verifiability and forward security.In this scheme,only the designated recipient could recover the signcryped plain message from ciphertext;the public verification process doesn＇t need receiver＇s private key and the plain message;and possesses forward security.Even if the signer＇s private key is divulged,the attackers can still not recover the plain message of the signcryption of this and past time.What＇s more,the scheme does not use Hash or Redundancy functions as its verification method as traditional methods do.Finally the security properties of this scheme is analysed in detail.

关 键 词：签密 认证加密 公开验证 前向安全 

分 类 号：TP309[自动化与计算机技术—计算机系统结构] TN918.1[自动化与计算机技术—计算机科学与技术]