NDLI: A logical language for expressing authorizations

Content Provider	IEEE Xplore Digital Library
Author	Jajodia, S. Samarati, P. Subrahmanian, V.S.
Copyright Year	1997
Description	Author affiliation: Dept. of Inf. Syst. & Syst. Eng., George Mason Univ., Fairfax, VA, USA (Jajodia, S.)
Abstract	A major drawback of existing access control systems is that they have all been developed with a specific access control policy in mind. This means that all protection requirements (i.e. accesses to be allowed or denied) must be specified in terms of the policy enforced by the system. While this may be trivial for some requirements, specification of other requirements may become quite complex or even impossible. The reason for this is that a single policy simply cannot capture the different protection requirements that users may need to enforce on different data. In this paper, we take a first step towards a model that is able to support different access control policies. We propose a logical language for the specification of authorizations on which such a model can be based. The Authorization Specification Language (ASL) allows users to specify, together with the authorizations, the policy according to which access control decisions are to be made. Policies are expressed by means of rules which enforce the derivation of authorizations, conflict resolution, access control and integrity constraint checking. We illustrate the power of our language by showing how different constraints that are sometimes required, but very seldom supported by existing access control systems, can be represented in our language.
Starting Page	31
Ending Page	42
File Size	1233118
Page Count	12
File Format	PDF
ISBN	0818678283
ISSN	10816011
DOI	10.1109/SECPRI.1997.601312
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-05-04
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Authorization Access control Protection Information systems Computer science Educational institutions National security Contracts Laboratories
Content Type	Text
Resource Type	Article

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