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《山东大学学报(理学版)》 ›› 2023, Vol. 58 ›› Issue (9): 16-27.doi: 10.6040/j.issn.1671-9352.0.2022.154

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时间可控的指定测试者可搜索代理重加密方案

吕娇1(),张茜1,秦静1,2,*()   

  1. 1. 山东大学数学学院, 山东 济南 250100
    2. 中国科学院信息工程研究所信息安全国家重点实验室, 北京 100093
  • 收稿日期:2022-03-16 出版日期:2023-09-20 发布日期:2023-09-08
  • 通讯作者: 秦静 E-mail:lvjiao@mail.sdu.edu.cn;qinjing@sdu.edu.cn
  • 作者简介:吕娇(1996—)，女，硕士研究生，研究方向为公钥密码学. E-mail：lvjiao@mail.sdu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(62072276);国家自然科学基金资助项目(61772311)

Time-controlled designated tester proxy re-encryption with keyword search scheme

Jiao LYU1(),Xi ZHANG1,Jing QIN1,2,*()   

  1. 1. School of Mathematics, Shandong University, Jinan 250100, Shandong, China
    2. State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing 100093, China
  • Received:2022-03-16 Online:2023-09-20 Published:2023-09-08
  • Contact: Jing QIN E-mail:lvjiao@mail.sdu.edu.cn;qinjing@sdu.edu.cn

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摘要：

针对可搜索代理重加密被用于实现密文数据交换共享, 但其不支持时间可控的访问授权, 也不能抵抗离线关键词猜测攻击的问题, 提出一个时间可控的指定测试者可搜索代理重加密方案, 该方案支持数据所有者将云端密文数据的搜索和解密权限在指定的时间范围内动态地授予数据使用者, 并且能够抵抗外部敌手的离线关键词猜测攻击。此外, 将该方案应用于不同医院之间共享患者电子病历场景, 基于联盟区块链设计一个具体的电子病历共享方案。

关键词: 可搜索代理重加密, 时间可控, 离线关键词猜测攻击, 数据共享

Abstract:

To solve the problem that the proxy re-encryption with keyword search is used to implement ciphertext data exchange and sharing, but it does not support time-controlled access authorization and cannot resist off-line keyword guessing attack, a time-controlled designated tester proxy re-encryption with keyword search scheme is proposed, which supports the data owner to grant dynamically the search and decryption rights of the ciphertext data in the cloud to the data user within a specified time range, and can resist the off-line keyword guessing attack by external adversaries. In addition, the scheme is applied to the scenario of sharing patients electronic medical records between different hospitals, and a specific electronic medical records sharing scheme is designed based on the consortium blockchain.

Key words: proxy re-encryption with keyword search, time control, off-line keyword guessing attack, data sharing

中图分类号: 

  • TP309.7

图1

区块链数据结构"

图2

tc-dPRES模型"

表1

功能性对比"

特征 Yang等方案[21] Shao等方案[1] Fang等方案[11] 本文提出的方案
外部离线KGA √ × × √
时间可控授权 √ × × √
搜索授权 √ √ × √
解密授权 × √ √ √

表2

计算开销对比"

算法 Shao等方案[1] 本文提出的方案
Enc 5te+2tp+ts 5te+2tp+ts
ReEnc te+4tp+tv 5te+4tp+tv
Trapdoor te 4te
Test 5tp+tv 2te+3tp
Dec te+5tp+tv te+tp

表3

通信开销对比"

算法 Shao等方案[1] 本文提出的方案
Enc |svk|+3|G1|+2|G2|+|σ| |svk|+3|G1|+2|G2|+|σ|
ReKeyGen |Zp* | |Zp* |
ReEnc |svk|+3|G1|+2|G2|+|σ| |svk|+6|G1|+2|G2|+|σ|
Timetoken — |G1|+|Zp* |
Trapdoor |G1| 3|G1|+|Zp* |

图3

电子病历共享模型"

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