Optimizing the Decryption Efficiency in LSSS Matrix-Based Attribute-Based Encryption Without Given Policy

LIU Meng-jun; LIU Shu-bo; WANG Ying; WANG Jing; LI Yong-kai; CAO Hui

doi:10.3969/j.issn.0372-2112.2015.06.004

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Optimizing the Decryption Efficiency in LSSS Matrix-Based Attribute-Based Encryption Without Given Policy

更新时间：2025-07-16

- Optimizing the Decryption Efficiency in LSSS Matrix-Based Attribute-Based Encryption Without Given Policy
- Acta Electronica Sinica Vol. 43, Issue 6, Pages: 1065-1072(2015)
- 作者机构：
  
  1. 武汉大学计算机学院,湖北,武汉,430072
  2. 武汉大学空天信息安全与可信计算教育部重点实验室(B类),湖北,武汉,430072
  3. 武汉大学计算机学院,湖北,武汉,430072
  4. 武汉大学空天信息安全与可信计算教育部重点实验室(B类),湖北,武汉,430072
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2015.06.004
  CLC： TP309
- Published：2015
- 稿件说明：
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LIU Meng-jun, LIU Shu-bo, WANG Ying, et al. Optimizing the Decryption Efficiency in LSSS Matrix-Based Attribute-Based Encryption Without Given Policy[J]. Acta Electronica Sinica, 2015, 43(6): 1065-1072.
DOI：

LIU Meng-jun, LIU Shu-bo, WANG Ying, et al. Optimizing the Decryption Efficiency in LSSS Matrix-Based Attribute-Based Encryption Without Given Policy[J]. Acta Electronica Sinica, 2015, 43(6): 1065-1072. DOI： 10.3969/j.issn.0372-2112.2015.06.004.

摘要

在基于LSSS(Linear Secret-Sharing Schemes)共享矩阵的属性密码方案中

为了获得相对较高的解密效率

需要剔除授权集合中冗余参与方在解密时的计算.为达到这一目的

现有方案都需要使用授权策略进行最小参与方搜寻

而在一些应用场合下

授权策略的出现是不安全的.如果不使用授权策略

现有的解密优化方案便无法运行.本文提出一种LSSS共享矩阵下

无授权策略的属性密码解密效率提高方案.理论分析和实验表明

它可以在无授权策略情况下

找到最小参与方集合

从而提高了解密效率.

Abstract

The redundant participants need to be excluded from the authorized set to achieve a high decryption efficiency in LSSS(Linear Secret-Sharing Schemes) matrix-based attribute-based encryption algorithms.The existing solutions achieve this by searching the minimum participant set in the previously given access policy.Some security threats

however

may be brought in under the previously given policy.And the absence of the access policy disables the existing searching-sound solutions.Thus

an optimizing solution is proposed.Intensive theory analysis and simulation show the proposed solution can get the minimum participant set

which improves the decryption efficiency.

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