A Key-policy Attribute-based Encryption Scheme with Constant Size Ciphertext

2012 ◽  
Author(s):  
Chang-Ji Wang ◽  
Jian-Fa Luo
Keyword(s):  
Encryption Scheme ◽  
Constant Size ◽  
Attribute Based Encryption ◽  
Key Policy

scholarly journals A Key-Policy Searchable Attribute-Based Encryption Scheme for Efficient Keyword Search and Fine-Grained Access Control over Encrypted Data

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 265 ◽  
Author(s):  
Hui Yin ◽  
Yinqiao Xiong ◽  
Jixin Zhang ◽  
Lu Ou ◽  
Shaolin Liao ◽  
...  
Keyword(s):  
Access Control ◽  
Large Scale ◽  
Keyword Search ◽  
Data Access ◽  
Encryption Scheme ◽  
Encrypted Data ◽  
Fine Grained ◽  
Data Access Control ◽  
Attribute Based Encryption ◽  
Key Policy

Attribute based encryption is a promising technique that achieves flexible and fine-grained data access control over encrypted data, which is very suitable for a secure data sharing environment such as the currently popular cloud computing. However, traditional attribute based encryption fails to provide an efficient keyword based search on encrypted data, which somewhat weakens the power of this encryption technique, as search is usually the most important approach to quickly obtain data of interest from large-scale dataset. To address this problem, attribute based encryption with keyword search (ABKS) is designed to achieve fine-grained data access control and keyword based search, simultaneously, by an ingenious combination of attribute based encryption and searchable encryption. Recently, several ABKS schemes have been constructed in secure cloud storage system for data access control and keyword search. Nonetheless, each of these schemes has some defects such as impractical computation overhead and insufficient access policy expression. To overcome these limitations, in this paper, we design a Key-Policy Searchable Attribute-based Encryption Scheme (KPSABES) based on the full-blown key-policy attribute-based encryption proposed by Vipul Goyal et al. By novel design, our scheme not only inherits all advantages of that scheme but also achieves efficient and secure keyword search over encrypted data. We provide the detailed performance analyses and security proofs for our scheme. Extensive experiments demonstrated that our proposed scheme is superior in many aspects to the similar work.

scholarly journals Insecurity of A Key-Policy Attribute Based Encryption Scheme With Equality Test

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 10189-10196 ◽  
Author(s):  
Yongjian Liao ◽  
Hongjie Chen ◽  
Fagen Li ◽  
Shaoquan Jiang ◽  
Shijie Zhou ◽  
...  
Keyword(s):  
Encryption Scheme ◽  
Attribute Based Encryption ◽  
Key Policy ◽  
Equality Test
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