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Today's VANET applications are vastly focused towards fulfilling users' requirements on road and making their journey safe and comfortable. In particular, safety applications will provide secure information to users and introduce mechanisms to help reduce the death rate due to road accidents. The most important aspect in such environment is the integrity of this safety information; it must be at all...
In mobile ad hoc networks, the security enforcement and its implementation becoming increasingly difficult due to quasi-static nature of the mobile nodes (wireless communication devices), no fixed network topology and more importantly absence of centralized authority. In such networks, communication links between nodes may be bandwidth constrained, messages typically roamed in multi-hoped fashion,...
Wireless sensor networks as sensor technology, microelectronics and wireless communication technology product of the combination, become an active field of computer science research branch, in the military and civilian applications has been widely. As WSNs is limited to low-power requirements of sensor nodes and nodes generally carry an energy which limited and non-replacement, the method which maintains...
This paper is concerned with fully distributed reputation-based mechanisms that improve security in MANETS. We introduce a number of optimisations to the current reputation schemes used in MANETs such as selective deviation tests and adaptive expiration timer that aim to deal with congestion and quick reputation convergence. We propose to use two different centrality measures for evaluation of the...
To deal with the challenges posed by device capacity and capability, and also the nature of ad hoc networks, service discovery model is needed that can resolve security and privacy issues with simple solutions. The use of complex algorithms and powerful fixed infrastructure is infeasible due to the volatile nature of mobile ad hoc environment and mobile devices. This paper presents a Secure and Lightweight...
The performance and security of ad hoc networks rely on the self-organized, collaborative and the trusted between the distributed links. To route and forward the data, it is important to evaluate the individual behavior of each node in network, benevolent nodes can keep the network working smoothly. However, malicious nodes present in the network that try to disrupt, distort or disturb the network...
In this paper we propose a game theoretic framework for routing in mobile ad hoc networks. A trust oriented auction based packet forwarding model is developed for stimulating cooperation among the nodes avoiding the selfish behavior. Our proposed scheme provides incentive for cooperative behavior of the node and the amount of incentive is decided by the trustworthiness of a node. To find the cost...
The traditional security solution based on cryptography and authentication is not sufficient for wireless sensor networks, which encounters new challenges from internal attackers, and trust is recognized as a novel approach to defend against such attacks. In this paper, we propose a trust-based LEACH (low energy adaptive clustering hierarchy) protocol to provide secure routing, while preserving the...
Wireless ad-hoc networks consist of devices communicating with each other without the need for a management infrastructure. As such, the very basic operation of ad-hoc networks is dependent on the cooperation of their nodes to provide connectivity and communication routes. In practice though, such cooperation may not always be achieved. Cases where some nodes behave in a selfish manner or maliciously...
Clustering in ad hoc networks consists in dividing the network into clusters (groups) managed by elected nodes called clusterheads. This technique has been used for different goals as routing efficiency, transmission management and information collection. As far as we know, no existing clustering algorithms have taken into account the existence of malicious nodes for clusterheads election and maintenance...
Trust plays an important role in peer-to-peer (P2P) networks for enabling peers to share resources and services. It is necessary to build an effective security trust model to solve the trust problem during interactions between peers. In this paper, we propose an enhanced trust model based on reputation. We apply SupP2Prep [Chhabra et al., 2004] in our trust model, which is a protocol for reputation...
This paper focuses on the security of the Athens wireless metropolitan network (AWMN), which is an established autonomous network. More specifically, it presents and analyzes the possible security attacks that threaten AWMN, its users and the provided services. Attempting to counteract these attacks and the related risks, we study and evaluate the application of known security measures in AWMN that...
In this paper the authors propose a cross-layer security management plane, with a main actor security, privacy and trust manager, which addresses: a) the defined requirements taking into account the diverse application spaces and their scenarios, b) the diverse node capabilities which is a characteristic for wireless sensor networks architecture and c) the change of the context and preferences of...
Ad-hoc networks, due to their improvised nature, are frequently established in insecure environments, which makes them susceptible to attacks. These attacks are launched by participating malicious nodes against different network services. Routing protocols, which act as the binding force in these networks, are a common target of these nodes. Ad-hoc on-demand distance vector (AODV) is one of the widely...
Groupware applications require secure communication and group-management services. Participants in such applications may have divergent interests and may not fully trust each other. The services provided must then be designed to tolerate possibly misbehaving participants. Enclaves is a software framework for building such group applications. We discuss how the protocols used by Enclaves can be modified...
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