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    <rdf:li resource="http://ebiquity.umbc.edu/project/html/id/34/Rei-A-Policy-Specification-Language"/>
    <rdf:li resource="http://ebiquity.umbc.edu/paper/html/id/121/A-Delegation-Based-Model-for-Distributed-Trust"/>
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 <image rdf:about="http://ebiquity.umbc.edu/img/logo.jpg">
  <title>UMBC ebiquity research group</title>
  <link>http://ebiquity.umbc.edu</link>
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 <item rdf:about="http://ebiquity.umbc.edu/project/html/id/34/Rei-A-Policy-Specification-Language">
  <title><![CDATA[Rei : A Policy Specification Language]]></title>
  <link>http://ebiquity.umbc.edu/project/html/id/34/Rei-A-Policy-Specification-Language</link>
  <description><![CDATA[Security is a critical problem in dynamic and open distributed
environments such as those enabled by the semantic web and pervasive computing technologies. The presence of heterogeneous entities that
are neither pre-determined nor permanent, and the lack of central
control are some of its challenges.  We believe that declarative
policies address this problem while maintaining openness and
flexibility.  We propose the use of policies defined in OWL to
constrain the behavior of entities i...]]></description>
  <dc:date>2002-04-01</dc:date>
 </item>
 <item rdf:about="http://ebiquity.umbc.edu/paper/html/id/121/A-Delegation-Based-Model-for-Distributed-Trust">
  <title><![CDATA[A Delegation Based Model for Distributed Trust]]></title>
  <link>http://ebiquity.umbc.edu/paper/html/id/121/A-Delegation-Based-Model-for-Distributed-Trust</link>
  <description><![CDATA[This paper discusses our infrastructure for handling distributed security and trust. It outlines a method for access control
across domains that handles complex inter domain trust relationships. We have developed a flexible representation of trust
information in Prolog, that can model permissions and delegations. We are currently working on modeling obligations,
entitlements, and prohibitions as well. This paper describes a scheme for restricting re-delegation without using a specific
del...]]></description>
  <dc:date>2001-08-01</dc:date>
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