ACP-ABE Scheme with Verifiable Outsourced Encryption and Decryption

YANG He-kun; FENG Chao-sheng; JIN Yun-xia; WANG Lin; LUO Wang-ping; DENG Hong-hui

doi:10.3969/j.issn.0372-2112.2020.08.012

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ACP-ABE Scheme with Verifiable Outsourced Encryption and Decryption

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- ACP-ABE Scheme with Verifiable Outsourced Encryption and Decryption
- Acta Electronica Sinica Vol. 48, Issue 8, Pages: 1545-1551(2020)
- 作者机构：
  
  1. 四川师范大学计算机科学学院,四川,成都,610101
  2. 广安职业技术学院,四川,广安,638500
  3. 网络与数据安全四川省重点实验室, 电子科技大学,四川,成都,610054
  4. 四川师范大学计算机科学学院,四川,成都,610101
  5. 广安职业技术学院,四川,广安,638500
  6. 网络与数据安全四川省重点实验室电子科技大学,四川,成都,610054
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2020.08.012
  CLC： TP309
- Published Online：25 August 2020，
  
  Published：2020
- 稿件说明：
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YANG He-kun, FENG Chao-sheng, JIN Yun-xia, et al. ACP-ABE Scheme with Verifiable Outsourced Encryption and Decryption[J]. Acta Electronica Sinica, 2020, 48(8): 1545-1551.
DOI：

YANG He-kun, FENG Chao-sheng, JIN Yun-xia, et al. ACP-ABE Scheme with Verifiable Outsourced Encryption and Decryption[J]. Acta Electronica Sinica, 2020, 48(8): 1545-1551. DOI： 10.3969/j.issn.0372-2112.2020.08.012.

摘要

针对现有的应用于基于属性加密方案的安全模指数外包算法存在会降低安全性、验证概率低、外包计算结果可能出错等问题，利用改进的安全模指数外包算法，提出一种支持可验证加解密外包的CP-ABE（Ciphertext-Policy Attribute-Based Encryption）方案.将属性相关密钥子项外包，将共享密文子项的一半计算任务外包，并对所有的外包结果进行验证.理论分析和实验结果都表明，和现有相关方案相比，无论在密钥生成时，还是在加密时，所提出方案的授权机构和用户客户端的计算量都有明显减少.安全性分析表明，所提出的方案达到CPA（Chosen Plaintext Attack）安全.

Abstract

The existing outsourcing algorithms for modular exponentiations has some problems such as low security

low probability of validation and wrong calculation results. a CP-ABE (Ciphertext-Policy Attribute-Based Encryption) scheme with verifiable outsourced encryption and decryption is proposed with the help of the improved algorithm for secure outsourcing of modular exponentiations. The scheme outsources attribute-related key subitems

outsources half of the computing tasks of shared ciphertext subitems

and verifies all the outsourced results. Theoretical and experimental analysis show that compared with the existing related schemes

both in key generation and encryption

the computing overhead of both authority centers and user clients of the proposed scheme has been significantly reduced. Security analysis shows that the proposed scheme can defend against chosen plaintext attacks.

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