Browsing by Author "Alwada'n, T."

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    Data confidentiality in mobile ad hoc networks.
    (2012) Aldabbas, Hamza; Alwada'n, T.; Janicke, Helge; Al-Bayatti, Ali Hilal
    Mobile ad hoc networks (MANETs) are self-configuring infrastructure-less networks comprised of mobile nodes that communicate over wireless links without any central control on a peer-to-peer basis. These individual nodes act as routers to forward both their own data and also their neighbours’ data by sending and receiving packets to and from other nodes in the network. The relatively easy configuration and the quick deployment make ad hoc networks suitable the emergency situations (such as human or natural disasters) and for military units in enemy territory. Securing data dissemination between these nodes in such networks, however, is a very challenging task. Exposing such information to anyone else other than the intended nodes could cause a privacy and confidentiality breach, particularly in military scenarios. In this paper we present a novel framework to enhance the privacy and data confidentiality in mobile ad hoc networks by attaching the originator policies to the messages as they are sent between nodes. We evaluate our framework using the Network Simulator (NS-2) to check whether the privacy and confidentiality of the originator are met. For this we implemented the Policy Enforcement Points (PEPs), as NS-2 agents that manage and enforce the policies attached to packets at every node in the MANET.
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    Dynamic policy management in mobile grid environments
    (Hindawi Publishing Corporation, 2012-03) Alwada'n, T.; Aldabbas, Hamza; Janicke, Helge; Khdou, T.; Aldabbas, O.
    Mobile Grid Services has given the ability to move jobs, data and application software from nodes to nodes during jobs execution in the grid environment. These migrations depend on the grid’s users and the grid’s nodes policies. The heterogeneity, diversity of policies and attributes leads to a need for policy management tools that can handle these problems. Also, before the users can submit their jobs or run their applications on a certain resource or system they may need to guarantee that this resource or system has not been compromised, which could result in their own application or data being stolen or asking for certain users to be allowed to access the service. To date, not enough attention has been paid to policies that deal with such concerns. Most existing grid systems have support only limited types of policies (e.g. CPU resources). A few designs consider enforcing data policies in their architecture. Therefore, we propose a dynamic policy framework that addresses these issues (user-submitted policy,data policy and multiple Virtual Organizations (VOs).
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    Ensuring data confidentiality and privacy in mobile ad hoc networks
    (2012) Aldabbas, Hamza; Janicke, Helge; AbuJassar, R.; Alwada'n, T.
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    Mobile Grid System: Policy and Privacy
    (LAP LAMBERT Academic Publishing, 2014-03-03) Alwada'n, T.; Aldabbas, Hamza; Janicke, Helge
    Mobile Grid Services have given the ability to move jobs, data and application software from nodes to nodes during jobs' execution in the grid environment. They have also solved some of the lack in finding suitable resources for the jobs. To facilitate the ability to support mobile resource sharing between multiple heterogeneous Virtual Organizations (VOs), an authorization policy management framework is needed to support authorization for heterogeneous authorization systems. Traditional authorization policy management frameworks act well in authorization policy for a single VO where the contributing hosts grant the permission to follow a global authorization system. However most of policy management tools do not provide a clear support for sharing mobile resources between multiple heterogeneous VOs. To solve this problem, we present in this book a dynamic and heterogeneous policy management framework that can give a clear policy definition about the ability to move jobs, data and application software from nodes to nodes during jobs' execution in the grid environment.
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    New framework for dynamic policy management in grid environments.
    (Springer, 2011) Alwada'n, T.; Janicke, Helge; Aldabbas, O.; Aldabbas, Hamza
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    New framework for policy support for Mobile Grid Services.
    (IEEE, 2011) Alwada'n, T.; Janicke, Helge; Aldabbas, O.; Alfawair, Mai
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    ItemOpen Access
    Security for Mobile Grid Systems
    (De Montfort University, 2012) Alwada'n, T.
    Grid computing technology is used as inexpensive systems to gather and utilize computational capability. This technology enhances applications services by arranging machines and distributed resources in a single huge computational entity. A Grid is a system that has the ability to organize resources which are not under the subject of centralized domain, utilize protocols and interfaces, and supply high quality of service. The Grid should have the ability to enhance not only the systems performance and job throughput of the applications participated but also increase the utilization scale of resources by employing effective resource management methods to the huge amount of its resources. Grid mobility appears as a technology to facilitate the accomplishment of requirements for Grid jobs as well as Grid users. This idea depends on migrating or relocating jobs, data and application software among Grid nodes. However, making use of mobility technology leads to data confidentiality problems within the Grid. Data confidentiality is the protection of data from intruders’ attacks. The data confidentiality can be addressed by limiting the mobility to trusted parts of the Grid, but this solution leads to the notion of Virtual Organizations (VOs). Also as a result of mobility technology the need for a tool to organize and enforce policies while applying the mobility has been increased. To date, not enough attention has been paid to policies that deal with data movements within the Grid. Most existing Grid systems have support only limited types of policies (e.g. CPU resources). A few designs consider enforcing data policies in their architecture. Therefore, we propose a policy-managed Grid environment that addresses these issues (user-submitted policy, data policy, and multiple VOs). In this research, a new policy management tool has been introduced to solve the mobility limitation and data confidentiality especially in the case of mobile sharing and data movements within the Grid. We present a dynamic and heterogeneous policy management framework that can give a clear policy definition about the ability to move jobs, data and application software from nodes to nodes during jobs’ execution in the Grid environment. This framework supports a multi-organization environment with different domains, supports the external Grid user preferences along with enforces policies for data movements and the mobility feature within different domains. The results of our research have been evaluated using Jade simulator, which is a software framework fully implemented in Java language and allows agents to execute tasks defined according to the agent policy. The simulation results have verified that the research aims enhance the security and performance in the Grid environments. They also show enhanced control over data and services distribution and usage and present practical evidence in the form of scenario test-bed data as to the effectiveness of our architecture.