Browsing by Author "Tekbacak, F."

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An architecture for verification of access control policies with multi agent system ontologies
(2009) Tekbacak, F.; Tuglular, T.; Dikenelli, O.; Tuğlular, Tuğkan; Bilgisayar Mühendisliği Bölümü
Multi-agent systems (MAS) which communicate with intra-domain and inter-domain agent platforms have access control requirements. Instead of a central mechanism, a fine-graned access control mechanism could have been applied to MAS platforms. This paper emphasizes MAS-based domain and security ontologies with XACML-based access control approach for MAS platforms. The domain dependent behaviour and access control parameters in agent ontologies could be combined within a common XACML policy document that is used through different MAS applications. Agent-based access control requirements and common XACML policy documents should be consistent to enforce policies for MAS. To obtain this condition, the translation of organizational policies and platform based policies have to be considered in detail and the verified policy features have to be enforced in MAS to provide access for resources. © 2009 IEEE.
Policies for role based agents in environments with changing ontologies
(International Foundation for Autonomous Agents and Multiagent Systems (IFAAMAS), 2011) Tekbacak, F.; Tuglular, T.; Dikenelli, O.; Tuğlular, Tuğkan; Bilgisayar Mühendisliği Bölümü; Bilgisayar Mühendisliği Bölümü
Software agents try to achieve the goals of roles that they have in an environment. It is supposed that the dynamic structure of role based agents can be connected with updatable domain ontologies of the environment. Ontology evolution can cause the update of agent behaviors or access restrictions to ontological elements. So regulation for the agent behaviors may be needed. Our motivation is to create a suitable policy model for agents, environments and organizations when ontologies in the environment can change. Copyright © 2011, International Foundation for Autonomous Agents and Multiagent Systems (www.ifaamas.org). All rights reserved.
A semantic based certification and access control approach using security patterns on SEAGENT
(2008) Tekbacak, F.; Tuglular, T.; Dikenelli, O.; Tuğlular, Tuğkan; Bilgisayar Mühendisliği Bölümü
In this paper, we propose a security infrastructure for communication between agents adaptable to FIPA security specifications by employing security patterns and semantic based policy descriptions. Security patterns are used as a generalized approach for generating security based services. This paper analyzes the authentication and semantic based access control among agents by using the security patterns.