北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2010, Vol. 33 ›› Issue (2): 11-15.doi: 10.13190/jbupt.201002.11.sunh

• 论文 • 上一篇    下一篇

标准模型下可证安全的基于身份门限签密方案

孙华,姚宣霞,刘行兵,韩晓光   

  1. 北京科技大学 信息工程学院, 北京 100083
  • 收稿日期:2009-06-20 修回日期:1900-01-01 出版日期:2010-04-28 发布日期:2010-04-28
  • 通讯作者: 孙华 E-mail:sh1227@163.com
  • 作者简介:孙 华(1980—), 男, 博士生; 郑雪峰(1951—), 男, 教授, 博士生导师.
  • 基金资助:

    国家自然科学基金项目(60674054)

Provable Secure Identity-based Threshold Signcryption Scheme in the Standard Model

SUN Hua, YAO Xuan-xia, LIU Xing-bing, HAN Xiao-guang   

  1. School of Information Engineering, University of Science and Technology, Beijing 100083, China
  • Received:2009-06-20 Revised:1900-01-01 Online:2010-04-28 Published:2010-04-28

摘要:

提出了一种有效的基于身份的门限签密方案. 采用双线性对映射技术,基于Waters和Paterson提出的签名方案,设计了标准模型下可证安全的门限签密方案,并利用决策双线性DiffieHellman问题的困难性证明了方案的语义安全性,同时利用计算DiffieHellman问题的困难性证明了方案的不可伪造性. 相对随机预言模型下的同类方案,本文方案更具有实际意义.

关键词: 门限签密, 标准模型, CDH问题, DBDH问题

Abstract:

An efficient identity-based threshold signcryption scheme was presented. With bilinear pairings technology, a proved secure threshold signcryption scheme was designed in the standard model, based on Waters and Paterson’s signature scheme. We prove its semantic security on the hardness of decisional bilinear Diffie-Hellman problem and its unforgeability on the hardness of computational Diffie-Hellman problem. Compared with other schemes in the random oracle model, this scheme is more meaningful.

Key words: Threshold signcryption, Standard model, Computational Diffie-Hellman problem, Decisional Bilinear Diffie-Hellman problem