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	<pub:MastersThesis rdf:about="http://ebiquity.umbc.edu/paper/html/id/545/Group-Centric-Information-Sharing-using-Hierarchical-Models">
		<rdfs:label><![CDATA[Group Centric Information Sharing using Hierarchical Models]]></rdfs:label>
		<pub:title><![CDATA[Group Centric Information Sharing using Hierarchical Models]]></pub:title>
		<pub:publishedOn rdf:datatype="&xsd;dateTime">2011-05-10T00:00:00-05:00</pub:publishedOn>
		<pub:abstract><![CDATA[Traditional security policies are often based on the concept of “need to know” and are typified by predefined and often rigid specifications of which principals and roles are 
pre-authorized to access the information. A recommendations of the 9/11 commission 
was to find ways to move from this traditional perspective toward one that 
emphasizes the “need to share”.  Ravi Sandhu and his colleagues have developed the 
Group centric secure information sharing model (gSIS) as a new model that is more adaptable to highly dynamic situations requiring information sharing.  We present an 
implementation of gSIS and demonstrate its usefulness to use-cases in information 
sharing in social media.  Our contributions include the prototype implementation, 
extension to the model such as hierarchical groups and necessary and 
sufficient conditions, and the use of the Semantic Web language for representing the central gSIS concepts and associated data.  Our framework uses a pragmatic approach 
of using semantic web technology to represent and reason about the hierarchy and procedural method to compute access decisions relying on the gSIS semantics.]]></pub:abstract>
		<pub:counter>1855</pub:counter>
		<pub:tag><![CDATA[group centric]]></pub:tag>
		<pub:tag><![CDATA[hierarchical groups]]></pub:tag>
		<pub:tag><![CDATA[information sharing]]></pub:tag>
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		<pub:tag><![CDATA[privacy]]></pub:tag>
		<pub:tag><![CDATA[semantic web]]></pub:tag>
		<pub:tag><![CDATA[social network]]></pub:tag>
		<pub:publisher><![CDATA[UMBC]]></pub:publisher>
		<pub:author>
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					<person:Person rdf:about="http://ebiquity.umbc.edu/person/html/Amit/Mahale"><person:name><![CDATA[Amit Mahale]]></person:name><rdfs:label><![CDATA[Amit Mahale]]></rdfs:label></person:Person>
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<person:Person rdf:about="http://ebiquity.umbc.edu/person/html/Amit/Mahale"><person:name><![CDATA[Amit Mahale]]></person:name><rdfs:label><![CDATA[Amit Mahale]]></rdfs:label></person:Person>
		</pub:firstAuthor>
		<pub:softCopy><pub:SoftCopy>
			<pub:softCopyFormat><![CDATA[PDF Document]]></pub:softCopyFormat>
			<pub:softCopyURI><![CDATA[http://ebiquity.umbc.edu/get/a/publication/570.pdf]]></pub:softCopyURI>
			<pub:softCopySize>7173410</pub:softCopySize>
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	</pub:MastersThesis>

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