A scheme of hidden-structure attribute-based encryption with multiple authorities

International Conference on Computer Information and Automation Engineering

计算机科学;运输工程

Ling, J.^1 ; Weng, A.X.^1

Faculty of Computer, Guangdong University of Technology, Guangzhou

510006, China^1

关键词: Attribute-based encryptions;    Hidden access structures;    Hidden structures;    Key generation;    Security issues;    Trusted attribute;    User revocation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/359/1/012005/pdf
DOI  :  10.1088/1757-899X/359/1/012005

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

In the most of the CP-ABE schemes with hidden access structure, both all the user attributes and the key generation are managed by only one authority. The key generation efficiency will decrease as the number of user increases, and the data will encounter security issues as the only authority is attacked. We proposed a scheme of hidden-structure attribute-based encryption with multiple authorities, which introduces multiple semi-trusted attribute authorities, avoiding the threat even though one or more authorities are attacked. We also realized user revocation by managing a revocation list. Based on DBDH assumption, we proved that our scheme is of IND-CMA security. The analysis shows that our scheme improves the key generation efficiency.