标准模型下基于身份的多接收者签密方案  

An ID-based signcryption scheme for multiple receivers in standard model

作　　者：祁正华[1] 杨庚[1] 任勋益[1] 王卉[1] 

机构地区：[1]南京邮电大学计算机学院,江苏南京210003

出　　处：《江苏大学学报（自然科学版）》2011年第5期573-577,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(60873231;61073188);中国博士后基金资助项目(20100471355);江苏省普通高校研究生科研创新计划项目(CX09B_151Z)

摘　　要：为了克服随机预言机模型下可证安全的加密方案在实际应用中并不安全的情况,提出了一种标准模型下基于身份的多接收者签密方案.方案利用椭圆曲线上的双线性对,将标准模型下基于身份的加密算法和多接收者签名算法相结合,建立基于身份的多接收者签密方案构架和安全概念,形成了具有安全、高效性的多接收者签密方案.先分析了方案的正确性,然后基于判定双线性D if-fie-Hellman假定分析了密文的不可区分性以及基于计算性D iffie-Hellman假定分析了签名的不可伪造性.结果表明,提出的方案不借助于随机预言机假设,具有较强的安全性,能够有效地提高多接收者网络应用环境的安全性;并且方案减少了双线性对计算耗时,具有高效性.In order to solve the application unsecure problems for provable secure encryption scheme of random oracles model,an identity-based multi-receiver signcryption scheme（IBRSC） under standard model was proposed.In the IBRSC,identity-based encryption algorithm and multi-receiver signature algorithm were combined with bilinear pairing on elliptic curves to form the ID-based signcryption scheme for multiple receivers scheme and security concept.A new secure,efficient identity-based multi-receiver signcryption scheme was proposed.The signcryption scheme was proved to be secure against adaptive chosen ciphertext attacks and adaptive chosen message attacks based on decisional bilinear Diffie-Hellman assumption and computational Diffie-Hellman assumption,respectively.The results show that the proposed scheme is fully secure without random oracles,and can efficiently improve the security of multi-receiver network and reduce computing consumption of bilinear pairing.

关 键 词：基于身份的密码体制 签密 标准模型 多接收者 双线性对 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]