Secure Attribute Based Encryption Enabled Cloud Storage System with Ciphertext Search

doi:10.3969/j.issn.1671-1122.2019.07.006

Abstract

Abstract:

As a new kind of network storage technologies, cloud storage gets most people's attentions. However, the privacy and security issues have seriously hindered the application and development of cloud storage service. We present a secure attribute-based encryption enabled cloud storage system with ciphertext search. The basic idea is that users first outsource encrypted private data to cloud servers, then cloud services distribute an attribute key to an authorized user. The user generates a trapdoor based on his attribute keys. Only the attributes of authorized users satisfy the access tree integrated in the ciphertext, and the authorized users are allowed to search on cloud encrypted data by the trapdoor. In order to effectively manage authorized users in the system, the idea of re-encryption is adopted to achieve the revocation and addition of the authorized user. Security analysis shows that the system can effectively protect the user's privacy, and performance analysis indicate that the system has desirable performance.

Key words: cloud storage, privacy leakage, attribute-based encryption, re-encryption

CLC Number:

TP309

Jianhua LIU, Xiaokun ZHENG, Dong ZHENG, Zhangheng AO. Secure Attribute Based Encryption Enabled Cloud Storage System with Ciphertext Search[J]. Netinfo Security, 2019, 19(7): 50-58.

Figures/Tables 3

References 30

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算法阶段	计算开销
系统建立	3nE?E₁?P
安全索引生成	(n?1)E?E₁
陷门生成	(2n?1)E
搜索	(n?1)P

方案	本文方案	文献[21]	文献[22]
系统建立	3nE?E₁?P	2nE?E₁?P	(n?1)E?E₁
安全索引生成	(n?1)E?E₁	(2n?4)E	(2n?1)E?E₁
陷门生成	(2n?1)E	(2n?5)E	(2n?1)E?2E₁
搜索	(n?1)P	(2n?3)P?E	(2n?1)P?E₁