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  1. Proceedings of the 2016 ACM on Cloud Computing Security Workshop (CCSW '16)
  2. Towards an Efficient Policy Evaluation Process in Multi-Tenancy Cloud Environments
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Data Analytics: Understanding Human Behavior based on Mobile Network Data
Executing Boolean Queries on an Encrypted Bitmap Index
Stratum Filtering: Cloud-based Detection of Attack Sources
On Information Leakage in Deduplicated Storage Systems
Co-location Resistant Strategy with Full Resources Optimization
Poly-Logarithmic Range Queries on Encrypted Data with Small Leakage
Oblivious RAM as a Substrate for Cloud Storage -- The Leakage Challenge Ahead
Message-Locked Proofs of Retrievability with Secure Deduplication
Encrypting Analytical Web Applications
Towards an Efficient Policy Evaluation Process in Multi-Tenancy Cloud Environments
Generic Efficient Dynamic Proofs of Retrievability
Assured Deletion in the Cloud: Requirements, Challenges and Future Directions

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Towards an Efficient Policy Evaluation Process in Multi-Tenancy Cloud Environments

Content Provider ACM Digital Library
Author Ayache, Meryeme Erradi, Mohammed Freisleben, Bernd Khoumsi, Ahmed
Abstract Cloud computing offers most of its services under multi-tenancy environments. To satisfy security requirements among collaborating tenants, each tenant may define a set of access control policies to secure access to shared data. Several cloud solutions make use of XACML to specify such policies. However, existing implementations of XACML perform a brute force search to compare a request to all existing rules in a given XACML policy. This decreases the decision process (i.e., policy evaluation) performance especially for policies with a large number of rules. In this paper, we propose an automata-based approach for an efficient XACML policy evaluation. We implemented our approach in a cloud policy engine called X2Automata. The engine first converts both XACML policies and access requests to automata. Second, it combines the two automata by a synchronous product. Third, it applies an evaluation procedure to the resulting automaton to decide whether an access request is granted or not. To highlight the efficiency of X2Automata, we compare its performance, based on the OpenStack cloud environment, with the XACML implementation named Balana.
Starting Page 55
Ending Page 59
Page Count 5
File Format PDF
ISBN 9781450345729
DOI 10.1145/2996429.2996431
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2016-10-28
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Access control Cloud computing Automata Multi-tenancy Xacml
Content Type Text
Resource Type Article
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