Ciphertext-Policy Weighted Attribute Based Encryption Scheme

doi:10.7652/xjtuxb201308008

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Ciphertext-Policy Weighted Attribute Based Encryption Scheme

更新时间：2025-05-08

- Ciphertext-Policy Weighted Attribute Based Encryption Scheme
- Vol. 47, Issue 8, Pages: 44-48+86(2013)
- 作者机构：
  
  西安电子科技大学通信工程学院,西安,710071
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201308008
  CLC： TP309
- Online First：10 August 2013，
  
  Published：2013
- 稿件说明：
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Ciphertext-Policy Weighted Attribute Based Encryption Scheme[J]. 2013, 47(8): 44-48+86.
DOI：

Ciphertext-Policy Weighted Attribute Based Encryption Scheme[J]. 2013, 47(8): 44-48+86. DOI： 10.7652/xjtuxb201308008.

摘要

在综合分析现有密文策略属性基加密方案的基础上

针对现有密文策略属性基加密方案较少考虑属性重要性的现状

将权重的概念引入到密文策略属性基加密方案中。授权机构依据属性在系统中的重要程度为其分配不同的权值

并依据属性的权值

通过属性转化算法将属性集合转化为属性权重分割集

利用线性秘密共享方法来实现密文策略权重属性基加密方案。提出了密文策略权重属性基加密方案的安全模型

在判定性双线性Diffie-Hellman指数假设下证明了该方案在标准模型下抵抗选择明文攻击的能力。密文策略权重属性基加密方案尽管在密文和密钥长度方面有所增加

但方案既可以支持细粒度的访问控制

又可以体现出属性的重要性

更加贴近于实际环境。

Abstract

The previous ciphertext-policy attribute based encryption scheme scarcely considers the significance of attributes. The concept of weight is thus introduced into the ciphertext-policy attribute based encryption scheme. The authority assigns different weights to attributes according to their importance in the system. The authority transfers the attribute set into weight attribute separation set according to the weight of attributes. Ciphertext-policy weighted attribute based encryption scheme is realized with linear secret sharing methods. And the security model of ciphertext-policy weighted attribute based encryption scheme is proposed. This scheme verifies the security against chosen-plaintext attack under the decisional bilinear Diffie-Hellman exponent(DBDHE)assumption in the standard model. Although the size of ciphertext and private key increases

the new scheme achieves fine-grained access control

and reflects the significance of attributes

which is more suitable for the practical applications.

关键词

Keywords

references

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