Cloud security is a shared responsibility between cloud providers and users. Reaching to an agreement about the dynamic policies considered for the access control decision-making process is not an easy task in cloud computing. Such dynamic policies can be built in a coarse-grained sharing manner between cloud providers and data owners. The trust notation can provide these dynamic policies, based on multiple factors that can accurately compute the user’s trust level for the granting access entity. In this paper, we have introduced the formal trust definition, which imports a novel method to provide the basis for granting access. It is based on two factors and their semantic relations which investigate important measures for the cloud environment. Also, a new Blacklisting and Forgiving Coarse-grained Access Control (BF-CAC) model has been proposed. The proposed model supports changing the user’s assigned permissions dynamically based on its trust level. In addition, BF-CAC ensures secure resource sharing between potential untrusted tenants. The proposed model has been implemented on our private cloud environment based on OpenStack. Finally, the experimental results have indicated that the trust level is decaying over time, thus no user can be trusted forever. Also, the number of assigned permissions for the same user is dynamically changing with the user’s final trust level.
목차
Abstract 1. Introduction 2. Formal Trust 2.1. Trust Factors and Relations 2.2. Trust Formula and Dynamics 3. Blacklisting and Forgiving Coarse-grained Access Control (BF-CAC) 3.1. Stage One: Computing Trust Level 3.2. Stage Two: Adjusting ABAC Access Policies 3.3. Stage Three: Blacklisting and Forgiving 3.4. Stage Four: User/Subject Authorization 4. Implementation and Analysis 4.1. Implementation 4.2. Experimental Verification 5. Related Work 6. Conclusion and Future Extensions References
키워드
Trustcloud securityaccess control modelscoarse-grained policy
저자
Khaled Riad [ School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing, China / Mathematics Department, Faculty of Science, Zagazig University, Zagazig, Egypt ]
보안공학연구지원센터(IJSIA) [Science & Engineering Research Support Center, Republic of Korea(IJSIA)]
설립연도
2006
분야
공학>컴퓨터학
소개
1. 보안공학에 대한 각종 조사 및 연구
2. 보안공학에 대한 응용기술 연구 및 발표
3. 보안공학에 관한 각종 학술 발표회 및 전시회 개최
4. 보안공학 기술의 상호 협조 및 정보교환
5. 보안공학에 관한 표준화 사업 및 규격의 제정
6. 보안공학에 관한 산학연 협동의 증진
7. 국제적 학술 교류 및 기술 협력
8. 보안공학에 관한 논문지 발간
9. 기타 본 회 목적 달성에 필요한 사업
간행물
간행물명
International Journal of Security and Its Applications
간기
격월간
pISSN
1738-9976
수록기간
2008~2016
등재여부
SCOPUS
십진분류
KDC 505DDC 605
이 권호 내 다른 논문 / International Journal of Security and Its Applications Vol.10 No.11