Authorization Control for a Semantic Data

Repository through an Inference Policy Engine

ABSTRACT:

Semantic models help in achieving semantic interoperability among sources of data and

applications. The necessity to efficiently manage these types of objects has increased the

number of specialized repositories, usually referred to as semantic databases. An increasing

number of project initiatives have been recorded that choose to formalize application

knowledge using ontologies and semantic data representation. Due to the various sensitivities

of data, suitable access control mechanisms pertaining to the semantic repository should be

put in place to ensure that only authorized users can obtain access to the information in its

entirety.In fact, deciding what can be made available to the user without revealing

confidential information is made even more difficult because the user may be able to apply

logic and reasoning to infer confidential information from the knowledge being provided. In

this paper, we design an authorization security model enforced on a semantic model’s entities

(concepts) and also propagate on their individuals in the OWL database through an inference

policy engine. We provide TBox access control for the construction of a TBox family and

propagate this based on the construction of concept taxonomies. We also provide ABox label-

based access control for facts in the domain knowledge and report experiments to evaluate

the effects of access control on reasoning and modularization.

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In this paper, we design an authorization security model enforced on a semantic model’s

entities (concepts) and also propagate on their individuals in the OWL database through an

inference policy engine. We provide TBox access control for the construction of a TBox

family and propagate this based on the construction of concept taxonomies. large amount of

data are available on the Internet, and managing it by means of traditional methods is

becoming very difficult. Novel tools and techniques are needed to effectively administer this

data, provide interoperability and warehousing between the numerous data supplies and

systems, and to obtain information from the databases and warehouses on the Internet.

.

PROPOSED SYSTEM:

We proposed a control model consisting of concept-level access that supports propagation

based on the relationships among concepts for the purpose of regulating the access to data by

individuals. Proposed policy languages similar to Rei based on Semantic Web languages like

RDF and DAML+OIL and developed a framework, Rein, based on Rei. Finin et al. proposed

the use of the OWL language as the formalization of the RBAC model. They provide two

ways to formalize an RBAC role, as a class or as an attribute. The proposed mechanism is

considered a highly structured multilayered authorization control for safeguarding semantic

data repositories, with mechanisms that fully support content-based access control, so that the

authorization requirements are established not only for concepts in TBox, but also for their

individuals in the ABox. we proposed a semantic reasoner authorization model conceived to

secure access to semantic repositories

CONCLUSION:

In this paper, we proposed a semantic reasoner authorization modelconceived to secure

access to semantic repositories. The model is able to restrict access to confidential knowledge

that is represented using ontologies and can regulate access to both the ontology’s concepts

and their individuals. Therefore, the model fully supports contentbasedaccess control. From a

functional perspective, the model consists of two main components: TBox access control for

the construction of the TBox family and ABox label-based access control for facts in the

domain knowledge. The model also supports a flexible mechanism for propagating

authorizations through a hierarchy concept tree.

SYSTEM CONFIGURATION:-

HARDWARE CONFIGURATION:-

Processor - Pentium –IV

Speed - 1.1 Ghz

RAM - 256 MB(min)

Hard Disk - 20 GB

Key Board - Standard Windows Keyboard

Mouse - Two or Three Button Mouse

Monitor - SVGA

SOFTWARE CONFIGURATION:-

Operating System : Windows XP

Programming Language : JAVA

Java Version : JDK 1.6 & above.