Controlled Access over Documents for Concepts Having Multiple Parents in a Digital Library Ontology

Dasgupta, Subhasis; Bagchi, Aditya

doi:10.1007/978-3-642-27245-5_33

Cited by 3 publications

(3 citation statements)

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“…Different research efforts on ontology-based systems and secured access to ontology structure for DL have already been reported partially in (Adam et al, 2002;Ray and Chakraborty, 2006;Dasgupta and Bagchi, 2011, 2012a, 2012b. This section provides the comprehensive model for security policy specification that covers the authorization of different users for accessing different concepts.…”

Section: Access Control Policies and Operational Issuesmentioning

confidence: 99%

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Resolving authorization conflicts by ontology views for controlled access to a digital library

Dasgupta

Pal

Mazumdar

et al. 2015

Journal of Knowledge Management

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Purpose – This paper provides a new Digital Library architecture that supports polyhierarchic ontology structure where a child concept representing an interdisciplinary subject area can have multiple parent concepts. The paper further proposes an access control mechanism for controlled access to different concepts by different users depending on the authorizations available to each such user. The proposed model thus provides a better knowledge representation and faster searching possibility of documents for modern Digital Libraries with controlled access to the system. Design/methodology/approach – Since the proposed Digital Library Architecture considers polyhierarchy, the underlying hierarchical structure becomes a Directed Acyclic Graph instead of a tree. A new access control model has been developed for such a polyhierarchic ontology structure. It has been shown that such model may give rise to undecidability problem. A client specific view generation mechanism has been developed to solve the problem. Findings – The paper has three major contributions. First, it provides better knowledge representation for present-day digital libraries, as new interdisciplinary subject areas are getting introduced. Concepts representing interdisciplinary subject areas will have multiple parents, and consequently, the library ontology introduces a new set of nodes representing document classes. This concept also provides faster search mechanism. Secondly, a new access control model has been introduced for the ontology structure where a user gets authorizations to access a concept node only if its credential supports it. Lastly, a client-based view generation algorithm has been developed so that a client’s access remains limited to its view and avoids any possibility of undecidability in authorization specification. Research limitations/implications – The proposed model, in its present form, supports only read and browse facilities. It would later be extended for addition and update of documents. Moreover, the paper explains the model in a single user environment. It will be augmented later to consider simultaneous access from multiple users. Practical implications – The paper emphasizes the need for changing the present digital library ontology to a polyhierarchic structure to provide proper representation of knowledge related to the concepts covering interdisciplinary subject areas. Possible implementation strategies have also been mentioned. This design method can also be extended for other semantic web applications. Originality/value – This paper offers a new knowledge management strategy to cover the gradual proliferation of interdisciplinary subject areas along with a suitable access control model for a digital library ontology. This methodology can also be extended for other semantic web applications.

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Section: Access Control Policies and Operational Issuesmentioning

confidence: 99%

“…The research group involved in this paper has made some study on these problems in connection with controlled access to a DL (Dasgupta and Bagchi, 2011, 2012a, 2012b. The model proposed in this paper accepts the presence of multiple parents in the concept hierarchy of DL ontology.…”

Section: Introductionmentioning

confidence: 99%

Resolving authorization conflicts by ontology views for controlled access to a digital library

Dasgupta

Pal

Mazumdar

et al. 2015

Journal of Knowledge Management

Self Cite

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show abstract

“…In other words, a user getting access to a concept may not get access to all the documents covered by that concept, particularly in a situation when a concept has multiple parent concepts. This gives rise to a flexible access control system for a DL environment hitherto unexplored [4]. This earlier work considered some implementation issues related to such access control environment.…”

Section: Introductionmentioning

confidence: 99%

A Graph-Based Formalism for Controlling Access to a Digital Library Ontology

Dasgupta

Bagchi

2012

Computer Information Systems and Industrial Management

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Part 2: Security, Access Control and Intrusion DetectionInternational audienceThis paper presents a graph-based formalism for an Ontology Based Access Control (OBAC) system applied to Digital Library (DL) ontology. It uses graph transformations, a graphical specification technique based on a generalization of classical string grammars to nonlinear structures. The proposed formalism provides an executable specification that exploits existing tools of graph grammar to verify the properties of a graph-based access control mechanism applicable to a digital library ontology description. It also provides a uniform specification for controlling access not only at the concept level but also at the level of the documents covered by the concepts including node obfuscation, if required

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Resolving conflicts between role-hierarchy and concept-hierarchy in a Digital Library ontology

Dasgupta

Bagchi

2012

2012 Third International Conference on Emerging Applications of Information Technology

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Controlled Access over Documents for Concepts Having Multiple Parents in a Digital Library Ontology

Cited by 3 publications

References 11 publications

Resolving authorization conflicts by ontology views for controlled access to a digital library

Resolving authorization conflicts by ontology views for controlled access to a digital library

A Graph-Based Formalism for Controlling Access to a Digital Library Ontology

Resolving conflicts between role-hierarchy and concept-hierarchy in a Digital Library ontology

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