[1]刘文扬,王志伟. 改进的外包解密策略隐藏CP-ABE方案[J].计算机技术与发展,2017,27(07):101-105.
　LIU Wen-yang,WANG Zhi-wei. Improved CP-ABE Scheme with Outsourced Decryption and Hidden Policy[J].,2017,27(07):101-105.
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 改进的外包解密策略隐藏CP-ABE方案()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
27
期数:
2017年07期
页码:
101-105
栏目:
安全与防范
出版日期:
2017-07-10

文章信息/Info

Title:
 Improved CP-ABE Scheme with Outsourced Decryption and Hidden Policy
文章编号:
1673-629X（2017)07-0101-05
作者:
 刘文扬; 王志伟
 南京邮电大学 计算机学院
Author(s):
 LIU Wen-yang; WANG Zhi-wei
关键词:
 ; 智能电网; 属性基加密; 策略隐藏; 外包解密
Keywords:
 ; smart grid; attribute-based encryption; hidden policy; outsourced decryption
分类号:
TP301
文献标志码:
A
摘要:
 为了有效解决属性基加密技术在智能电网领域应用中计算效率低以及访问策略隐藏等问题,在CP-ABE方案的基础上,提出了一种改进的CP-ABE方案.该方案具有外包解密计算功能和策略隐藏能力,利用单向匿名密钥协商技术达到了模糊属性的目的,以实现策略隐藏能力.在解密过程中,对密钥进行转换,将转换密钥和密文发送给计算代理,实现解密计算的外包,减轻了用户的计算代价,提高了方案的解密计算效率.与原方案及其他同类方案相比,所提出的方案在拥有同等安全级别的同时,增加了策略隐藏功能,同时显著提高了解密计算效率.安全性分析结果表明,所提出的新方案能够抵抗共谋攻击,保证数据的机密性;性能分析表明,所提出的方案在密文长度以及解密复杂性方面均有很大程度的改进.
Abstract:
 In order to tackle the problems of computational efficiency and hide access policy in smart grid for attribute-based encryption scheme,an improved CP-ABE scheme has been proposed based on CP-ABE,which has been endowed with the capabilities of outsourced decryption and policy hidden.It employs one-way anonymous key agreement to fuzzy attribute in order to realize hide access policy.In the process of decryption,a transformed key and the cipher text have been sent to a proxy to finish outsource of decryption computation,which could reduce the calculation cost on user’s side and improve decryption efficiency.Compared with the original scheme and other similar schemes,the proposed scheme has increased the capability of policy hidden and improved the computational efficiency significantly while having the same security level.Security analysis indicates that it has resisted collusion attack and ensured data confidentiality.Performance analysis show that the length of cipher text and decryption efficiency has been improved.

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更新日期/Last Update: 2017-08-22