Said Daoudagh

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Access control policies are usually specified by the XACML language. However, policy definition could be an error prone process, because of the many constraints and rules that have to be specified. In order to increase the confidence on defined XACML policies, an accurate testing activity could be a valid solution. The typical policy testing is performed by(More)
The specification of access control policies with the XACML language could be an error prone process, so a testing is usually the solution for increasing the confidence on the policy itself. In this paper, we compare two methodologies for deriving test cases for policy testing, i.e. XACML requests, that are implemented in the X-CREATE tool. We consider a(More)
Testing of security policies is a critical activity and mutation analysis is an effective approach for measuring the adequacy of a test suite. In this paper, we propose a set of mutation operators addressing specific faults of the XACML 2.0 access control policy and a tool, called XACMUT (XACml MUTation) for creating mutants. The tool generates the set of(More)
The implementation of an authorization system is a difficult and error-prone activity that requires a careful verification and testing process. In this paper, we focus on testing the implementation of the PolPA authorization system and in particular its Policy Decision Point (PDP), used to define whether an access should be allowed or not. Thus exploiting(More)
The implementation of an authorization system is a critical and error-prone activity that requires a careful verification and testing process. As a matter of fact, errors in the authorization system code could grant accesses that should instead be denied, thus jeopardizing the security of the protected system. In this paper, we address the testing of the(More)
In modern pervasive application domains, such as Service Oriented Architectures (SOAs) and Peer-to-Peer (P2P) systems, security aspects are critical. Justified confidence in the security mechanisms that are implemented for assuring proper data access is a key point. In the last years XACML has become the de facto standard for specifying policies for access(More)
In access control systems, aimed at regulating the accesses to protected data and resources, a critical component is the Policy Decision Point (PDP), which grants or denies the access according to the defined policies. Due to the complexity of the standard languag-e, it is recommended to rely on model-driven approaches which allow to overcome difficulties(More)