NDLI: Beyond separation of duty: An algebra for specifying high-level security policies

Content Provider	ACM Digital Library
Author	Li, Ninghui Wang, Qihua
Copyright Year	2008
Abstract	The process of introducing security controls into a sensitive task, which we call secure task design in this article, consists of two steps: high-level security policy design and low-level enforcement scheme design. A high-level security policy states an overall requirement for a sensitive task. One example of a high-level security policy is a separation of duty policy, which requires a task to be performed by a team of at least $\textit{k}$ users. Unlike low-level enforcement schemes such as security constraints in workflows, a separation of duty policy states a high-level requirement about the task without referring to individual steps in the task. While extremely important and widely used, separation of duty policies state only requirements on the number of users involved in the task and do not capture the requirements on these users' attributes. In this article, we introduce a novel algebra that enables the formal specification of high-level policies that combine requirements on users' attributes with requirements on the number of users motivated by separation of duty considerations. We give the syntax and semantics of the algebra and study algebraic properties of its operators. After that, we study potential mechanisms to enforce high-level policies specified in the algebra and a number of computational problems related to policy analysis and enforcement.
Starting Page	1
Ending Page	46
Page Count	46
File Format	PDF
ISSN	00045411
e-ISSN	1557735X
DOI	10.1145/1379759.1379760
Journal	Journal of the ACM (JACM)
Volume Number	55
Issue Number	3
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2008-08-06
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Access control Policy design Separation of duty
Content Type	Text
Resource Type	Article
Subject	Hardware and Architecture Information Systems Control and Systems Engineering Artificial Intelligence Software

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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