电子学报 ›› 2015, Vol. 43 ›› Issue (11): 2187-2193.DOI: 10.3969/j.issn.0372-2112.2015.11.008

• 学术论文 • 上一篇    下一篇

对一个匿名多接收者签密方案的安全性分析与改进

李慧贤, 巨龙飞   

  1. 西北工业大学计算机学院, 陕西 西安 710072
  • 收稿日期:2013-12-31 修回日期:2015-04-27 出版日期:2015-11-25
    • 通讯作者:
    • 李慧贤
    • 作者简介:
    • 巨龙飞 男,1989年生于河北邢台市.现为西北工业大学计算机学院硕士生.研究方向为安全协议分析与设计、多接收者签密.E-mail:julongfei0@gmail.com
    • 基金资助:
    • 国家自然科学基金 (No.61103178); 中央高校基本科研业务费专项资金 (No.3102015JSJ0003); 陕西省自然科学基础研究计划资助项目 (No.2015JM6294)

Security Analysis and Improvement of an Anonymous Multi-Receiver Signcryption Scheme

LI Hui-xian, JU Long-fei   

  1. School of Computer Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China
  • Received:2013-12-31 Revised:2015-04-27 Online:2015-11-25 Published:2015-11-25

摘要:

2011年,庞等人利用拉格朗日插值多项式方法构造了一个新的基于身份的多接收者匿名签密方案,并声称在其方案中任何攻击者或合法接收者都无法获取其他合法接收者的身份信息,从而能够保护接收者隐私.本文对庞等人的多接收者签密方案进行安全性分析,发现其方案中任何接收者对于其他接收者都无法实现匿名.同时,本文在其方案基础上进行改进,提出了一种改进方案,以弥补其安全缺陷.最后在随机预言模型下,对改进方案的正确性和接收者匿名性进行了证明.

关键词: 多接收者签密, 匿名性, 基于身份的签密, 拉格朗日插值

Abstract:

In 2011,Pang et al proposed a new multi-receiver ID-based anonymous signcryption scheme by using Lagrange interpolating polynomial.They announced that their scheme makes it impossible for an attacker or any other message receivers to derive the identity of a message receiver such that the privacy of each receiver can be guaranteed.In this work,we studied the security of Pang et al's anonymous multi-receiver signcryption scheme.It is regretful that we found a receiver is not really anonymous to any other receivers in Pang et al's scheme.In order to solve this security defect,an improved scheme was proposed.Finally,the improved scheme was proved to satisfy the correctness and receiver anonymity in the random oracle model.

Key words: multi-receiver signcryption, anonymity, identity-based signcryption, Lagrange interpolating

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