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一种用户匿名的身份型混合广播签密方案

An ID-based Hybrid Broadcast Signcryption Scheme with User Anonymity
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摘要 广播签密能够通过一步操作实现发送方对多个接收方的消息发送。为了有效解决"一对多"通信模型中的效率不高、开销较大以及隐私安全等问题,提出一种用户匿名的身份型广播签密方案。方案利用双线性对与Lagrange插值函数进行构造,并基于判定双线性Diffie-Hellman问题与计算性Diffie-Hellman问题证明了算法的安全性。除保证了机密性和不可伪造性之外,还满足可公开验证性和用户匿名性。分析表明,提出的方案签密运算量仅为(t+3)s+p,比同类方案的运算量小,大幅度地提高了运算效率。 Broadcast signcryption can make the sender send multi messages to recipients by one operation. In order to efficiently solve the problems of low efficiency, large overhead and privacy security in ＂one-to-many＂ communication model, an ID-based broadcast signcryption scheme （IBBSC） with user anonymity was proposed. Using bilinear pairings and the Lagrange interpolating function, the signcryption scheme was constructed. And the security of the algorithms was proven based on decisional bilinear Diffie-HeUman prob- lem and computational Diffie-Hellman problem. The public verifiablity and user anonymity were also achieved in addition to the confi- dentiality and unforgeability in the IBBSC. Analysis showed that the signcryption algorithm operates only in （t ＋ 3 ）s ＋ p, smaller than the amount of computation of similar schemes, and it significantly improved the efficiency of computations.
作者 林志强 杨晓元 韩益亮
机构地区 武警工程大学电子技术系武警部队密码与信息安全保密重点实验室 武警工程大学电子技术系网络与信息安全研究所
出处 《四川大学学报（工程科学版）》 EI CAS CSCD 北大核心 2013年第6期33-38,共6页 Journal of Sichuan University (Engineering Science Edition)
基金 国家自然科学基金资助项目(61272492 61103231 61103230) 陕西省自然科学研究计划资助项目(2011JM8012)
关键词 广播签密 LAGRANGE插值 可公开验证 用户匿名 broadcast signcryption Lagrange interpolation public verifiability user anonymity
分类号 TP309 [自动化与计算机技术—计算机系统结构]
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参考文献13

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共引文献16

四川大学学报（工程科学版）
2013年 第6期

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