Earticle

초록

영어

Nowadays, more and more users outsource their data to third party cloud storage servers for the purpose of sharing, so cloud data sharing becomes one of the popular services offered by cloud service providers. However, the third party storage servers in cloud data sharing systems, which are not fully trusted by data owners, make access control to the shared data a challenging issue. Although Ciphertext-Policy Attribute-Based Encryption (CP-ABE) is an emerging cryptographic solution for this issue, dealing with dynamic changes to users' access privileges (attribute revocation) in its practical applications as cloud data sharing systems is a real challenge. To overcome this challenge, we propose a fine-grained access control scheme for cloud data sharing systems by designing secure and efficient attribute-revocable CP-ABE scheme. Our scheme only allows non-revoked users in the attribute group to update their secret key by themselves using their unique key-update keys and the ciphertexts are updated by minimally trusted cloud server using a ciphertext-update key. Compared with the existing access controls achieved by attribute-revocable CP-ABE schemes, our proposed access control scheme reduces the trust degree of the cloud server in the attribute revocation mechanism. Furthermore, the analysis indicates that our access control scheme is more secure and efficient to apply to practical scenarios.

목차

Abstract
 1. Introduction
 2. Preliminaries
  2.1. Access Structure
  2.2. Lagrange Interpolation
  2.3. Shamir Secret Sharing Scheme
  2.4. Bilinear Maps
  2.5. Decisional Bilinear Diffie-Hellman (DBDH) Assumption.
 3. Definitions and Models
  3.1. System Model
  3.2. Algorithm Definitions
  3.3. Security Model and Security Requirements
 4. Access Control by Secure and Efficient Attribute-Revocable CPABE
  4.1. Scheme Overview
  4.2. Scheme Construction
  4.3. Correctness
 5. Analysis of Our Proposed Access Control
  5.1. Comprehensive Analysis
  5.2. Security Analysis
  5.3. Performance Analysis
 6. Conclusion
 References

키워드

저자

• Nyamsuren Vaanchig [ School of Information and Software Engineering, University of Electronic Science and Technology of China ] Corresponding Author
• Wei Chen [ School of Information and Software Engineering, University of Electronic Science and Technology of China ]
• Zhiguang Qin [ School of Information and Software Engineering, University of Electronic Science and Technology of China ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Security and Its Applications

• 간기

  격월간

• pISSN

  1738-9976

• 수록기간

  2008~2016

• 등재여부

  SCOPUS

• 십진분류

  KDC 505 DDC 605