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山东大学学报（理学版） ›› 2017, Vol. 52 ›› Issue (6): 64-68.doi: 10.6040/j.issn.1671-9352.2.2016.215

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基于环签名的支持多PKG身份基加密方案

罗鹏1,杨晓元1,2   

  1. 1.武警工程大学电子技术系密码与信息安全武警部队重点实验室, 陕西 西安 710086;2.武警工程大学信息安全研究所, 陕西 西安 710086
  • 收稿日期:2016-08-16 出版日期:2017-06-20 发布日期:2017-06-21
  • 作者简介:罗鹏(1988— ),男,硕士,研究方向为密码学、信息安全. E-mail:1786667219@qq.com
  • 基金资助:
    国家自然科学基金资助项目(61572521,61272492);武警工程大学基金课题(wjy201419)

Identity-based encryption in multiple PKG environment based on ring signature

LUO Peng1, YANG Xiao-yuan1,2   

  1. 1.Key Laboratory of Cryptology &
    Information Security of APF, Engineering University of APF, Xian 710086, Shaanxi, China;
    2. Research Institution of Information Security of APF, Engineering University of APF, Xian 710086, Shaanxi, China
  • Received:2016-08-16 Online:2017-06-20 Published:2017-06-21

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摘要： 将环签名和基于身份的密码体制(identity-based encryption, IBE)相结合,构造出了一种新的、具有多个密钥生成中心(private key generator, PKG)的IBE体制,即基于环签名的多PKG身份类加密体制。并在格上构造出一种标准模型下安全的基于环签名的多PKG身份类加密方案,方案的安全性基于小整数解问题和带差错学习问题的困难性。与现有的IBE方案和其变种相比,新方案减轻了PKG的负担,更适用于庞大的组织,且具有更好的应用灵活性。

关键词: 环签名, 基于身份的密码体制, 格

Abstract: Combining ring signatures with identity-based encryption, a new identity-based encryption with multiple private key generators was constructed, that is, scheme of multiple private key generators identity-based encryption based on ring signatures. Then a multiple private key generator identity-based encryption scheme on lattice based on ring signatures in the standard model was constructed, the security of the scheme was based on the difficulty of small integer solution problems and learning with errors on lattice. Compared with the existing scheme of identity-based encryption and its variation, the new scheme decreased the burdens of private key generator which more applicable to huge system and had higher application flexibility.

Key words: lattice, ring signature, Identity-based encryption

中图分类号: 

  • TP309
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