4,659 research outputs found

    Protocolos de enrutamiento anónimos para redes Ad-Hoc (2ª parte)

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    En estas diapositivas de la asignatura Diseño Avanzado de Redes del Máster en Investigación en Ingeniería de Sistemas y de la Computación se expone una versión simplificada del protocolo de enrutamiento anónimo SDAR (an efficient Secure Distributed Anonymous Routing protocol for mobile and wireless ad-hoc networks) para redes Ad-Hoc inalámbricas

    Security and Privacy Issues in Wireless Mesh Networks: A Survey

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    This book chapter identifies various security threats in wireless mesh network (WMN). Keeping in mind the critical requirement of security and user privacy in WMNs, this chapter provides a comprehensive overview of various possible attacks on different layers of the communication protocol stack for WMNs and their corresponding defense mechanisms. First, it identifies the security vulnerabilities in the physical, link, network, transport, application layers. Furthermore, various possible attacks on the key management protocols, user authentication and access control protocols, and user privacy preservation protocols are presented. After enumerating various possible attacks, the chapter provides a detailed discussion on various existing security mechanisms and protocols to defend against and wherever possible prevent the possible attacks. Comparative analyses are also presented on the security schemes with regards to the cryptographic schemes used, key management strategies deployed, use of any trusted third party, computation and communication overhead involved etc. The chapter then presents a brief discussion on various trust management approaches for WMNs since trust and reputation-based schemes are increasingly becoming popular for enforcing security in wireless networks. A number of open problems in security and privacy issues for WMNs are subsequently discussed before the chapter is finally concluded.Comment: 62 pages, 12 figures, 6 tables. This chapter is an extension of the author's previous submission in arXiv submission: arXiv:1102.1226. There are some text overlaps with the previous submissio

    Development of Advanced Location Based Efficient Routing in MANETs

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    Mobile Ad Hoc Networks (MANETs) use routing protocols that are anonymous and provides hiding of crucial node identities and routes, so that outside observers cannot trace the route and also the crucial nodes, in this way it provides better protection. There are many existing anonymous routing protocols which rely on either hop-by-hop encryption or redundant traffic. Both the methods used are highly costly and also they don't generate full anonymity protection to the nodes or routers and also the source and destination. As the cost is high while using this anonymity protection categories it creates problem in the resource constraints in MANETs especially in multimedia wireless applications high cost exacerbates the intrinsic resource constraint problem are seen in MANETs especially in wireless multimedia applications. To provide protection at low cost, an Advanced Location-based Efficient Routing in MANET (ALER).It dynamically partitions the network field into different zones and it randomly chooses nodes in zones as intermediate relay nodes, these relay nodes forms a non-traceable anonymous route, not only that the proposed protocol also helps in hiding the sender and the destination also very efficiently. It also has strategies to effectively counter intersection, timing attacks. In this routing technique it has tried to overcome the Sybil attack issues which were not solved by the routing technique. It has prevented the Sybil attack entirely by having forwarding nodes check source routes for loops

    A Lightweight and Attack Resistant Authenticated Routing Protocol for Mobile Adhoc Networks

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    In mobile ad hoc networks, by attacking the corresponding routing protocol, an attacker can easily disturb the operations of the network. For ad hoc networks, till now many secured routing protocols have been proposed which contains some disadvantages. Therefore security in ad hoc networks is a controversial area till now. In this paper, we proposed a Lightweight and Attack Resistant Authenticated Routing Protocol (LARARP) for mobile ad hoc networks. For the route discovery attacks in MANET routing protocols, our protocol gives an effective security. It supports the node to drop the invalid packets earlier by detecting the malicious nodes quickly by verifying the digital signatures of all the intermediate nodes. It punishes the misbehaving nodes by decrementing a credit counter and rewards the well behaving nodes by incrementing the credit counter. Thus it prevents uncompromised nodes from attacking the routes with malicious or compromised nodes. It is also used to prevent the denial-of-service (DoS) attacks. The efficiency and effectiveness of LARARP are verified through the detailed simulation studies.Comment: 14 Pages, IJWM
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