Adaptive secure outsourced attribute-based encryption scheme with keyword search

doi:10.11772/j.issn.1001-9081.2020121987

Journal of Computer Applications ›› 2021, Vol. 41 ›› Issue (11): 3266-3273.DOI: 10.11772/j.issn.1001-9081.2020121987

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Adaptive secure outsourced attribute-based encryption scheme with keyword search

Lifeng GUO¹^,²(), Qianli WANG¹

^1.School of Computer and Information Technology，Shanxi University，Taiyuan Shanxi 030006，China
^2.Institute of Big Data Science and Industry，Shanxi University，Taiyuan Shanxi 030006，China

Received:2020-12-17 Revised:2021-07-28 Accepted:2021-08-03 Online:2021-03-22 Published:2021-11-10
Contact: Lifeng GUO
About author:WU Guangfu，born in 1977，Ph. D.，associate professor. His research interests include information theory and channel coding， cryptography and network security，blockchain
DAI Ziheng，born in 1995，M. S. candidate. His research interests include channel coding，cryptography and information security.
Supported by:
the General Program of Natural Science Foundation of Shanxi(201901D111029);the Key Research and Development Program of Shanxi Province （International Science and Technology Cooperation）(201903D421003);the Science and Technology Innovation Project of Colleges and Universities of Shanxi Province(2019L0114)

自适应安全的带关键字搜索的外包属性基加密方案

郭丽峰¹^,²(), 王倩丽¹

^1.山西大学计算机与信息技术学院，太原 030006
^2.山西大学大数据科学与产业研究院，太原 030006

通讯作者: 郭丽峰
作者简介:郭丽峰（1975—），女，山西忻州人，教授，博士，主要研究方向：密码学、网络安全
王倩丽（1995—），女，山西汾阳人，硕士研究生，主要研究方向：密码学。
基金资助:
山西省自然科学基金面上项目(201901D111029);山西省重点研发计划（国际科技合作）项目(201903D421003);山西省高等学校科技创新项目(2019L0114)

Abstract

Abstract:

In order to solve the problems of high computational cost of Attribute-Based Encryption （ABE） scheme and low efficiency of data search in cloud servers simultaneously， an Outsourced Attribute-Based Encryption scheme with Keyword Search （OABE-KS） was proposed. Firstly， the outsourced computation technology was used for reducing the local computing cost of encryption and decryption users to the constant level. Then， the indexes and trapdoors of the corresponding keywords were generated by the encryption user and the decryption user respectively， and the cloud server was used to match them. After that， the successful matching results would be returned to the decryption user by the cloud server. The adaptive security of the proposed scheme was proved under the composite order group. According to the experimental analysis， when the number of attributes changes from 10 to 100， the running time of each stage of the proposed scheme is basically unchanged， showing that the running time of the proposed scheme in each stage does not vary with the number change of attributes. Experimental results show that， the proposed scheme is suitable for the application on resource-limited devices and is not affected by the number of attributes in practical applications.

Key words: cloud server, Attribute-Based Encryption (ABE), verifiable outsourced computation, keyword search, adaptive security, dual-system

摘要：

为同时解决属性基加密（ABE）方案的计算成本过高和云服务器中数据查找效率低下的问题，提出了一种带关键字搜索的外包属性基加密（OABE-KS）方案。首先，使用外包计算技术将加解密用户的本地计算成本降低到常量级；然后，由加密用户和解密用户分别生成对应关键字的索引和陷门，并由云服务器为其进行匹配，在此之后云服务器会将匹配成功的结果返回给解密用户。在合数阶群下证明了所提方案是自适应安全的。根据实验分析可知，属性数量从10个到100个变化的过程中，该方案各个阶段的运行时间基本不变，可见该方案在各个阶段的运行时间不随属性数量的变化而变化。实验结果表明，该方案适合应用在资源受限的设备上，使其在实际应用中不受属性数量变化的影响。

关键词: 云服务器, 属性基加密, 可验证外包计算, 关键字搜索, 自适应安全, 双系统

CLC Number:

TP309

Lifeng GUO, Qianli WANG. Adaptive secure outsourced attribute-based encryption scheme with keyword search[J]. Journal of Computer Applications, 2021, 41(11): 3266-3273.

郭丽峰, 王倩丽. 自适应安全的带关键字搜索的外包属性基加密方案[J]. 《计算机应用》唯一官方网站, 2021, 41(11): 3266-3273.

Figures/Tables 7

Fig. 1 System structure of outsourced attribute-based encryption scheme with keyword search

Tab. 1 Function and security comparison of different schemes

方案	大属性集合	外包加/解密计算	关键字可搜索	标准模型	完全安全
文献［8］方案	×	×	√	√	√
文献［16］方案	√	√	√	×	×
文献［17］方案	√	√	√	×	×
文献［18］方案	×	√	√	×	×
文献［5］方案	×	×	×	√	√
本文方案	√	√	√	√	√

Tab. 2 Performance comparison of different schemes

方案	Setup	Encrypt_DO	Test	Decrypt_DU
文献［8］方案	$P + E G T$	$4 E G$	$2 P$
文献［16］方案	$P + E G T$	$P + E G + E G T$	$l 3 P + 2 E G + E G T$	$E G T$
文献［17］方案	$6 E G T + 2 P$	$4 E G T + 4 + \| l \| E G$	$4 P$	$2 P$
文献［18］方案	$P + E G T + (3 + \| U \|) E G$	$(2 \| l \| + 1) E G$	$2 P$	$E G T$
文献［5］方案	$(2 + \| U \|) E G + P + E G T$	$E G T + (2 + 3 \| l \|) E G$		$(2 + 2 \| S \|) P$
本文方案	$2 E G + P + E G T$	$4 E G T$	$3 P + E G T$	$E G T$

Tab. 2 Performance comparison of different schemes

方案	Setup	Encrypt_DO	Test	Decrypt_DU
文献［8］方案	$P + E G T$	$4 E G$	$2 P$
文献［16］方案	$P + E G T$	$P + E G + E G T$	$l 3 P + 2 E G + E G T$	$E G T$
文献［17］方案	$6 E G T + 2 P$	$4 E G T + 4 + \| l \| E G$	$4 P$	$2 P$
文献［18］方案	$P + E G T + (3 + \| U \|) E G$	$(2 \| l \| + 1) E G$	$2 P$	$E G T$
文献［5］方案	$(2 + \| U \|) E G + P + E G T$	$E G T + (2 + 3 \| l \|) E G$		$(2 + 2 \| S \|) P$
本文方案	$2 E G + P + E G T$	$4 E G T$	$3 P + E G T$	$E G T$

Fig. 2 Time of system initialization and setup for different schemes

Fig. 3 Local running time of encryption user for different schemes

Fig. 4 Search time of cloud server for different schemes

Fig. 5 Local running time of decryption user for different schemes

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Adaptive secure outsourced attribute-based encryption scheme with keyword search

自适应安全的带关键字搜索的外包属性基加密方案

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