1,727 research outputs found
Security and Privacy Issues in Wireless Mesh Networks: A Survey
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
Energy efficient mining on a quantum-enabled blockchain using light
We outline a quantum-enabled blockchain architecture based on a consortium of
quantum servers. The network is hybridised, utilising digital systems for
sharing and processing classical information combined with a fibre--optic
infrastructure and quantum devices for transmitting and processing quantum
information. We deliver an energy efficient interactive mining protocol enacted
between clients and servers which uses quantum information encoded in light and
removes the need for trust in network infrastructure. Instead, clients on the
network need only trust the transparent network code, and that their devices
adhere to the rules of quantum physics. To demonstrate the energy efficiency of
the mining protocol, we elaborate upon the results of two previous experiments
(one performed over 1km of optical fibre) as applied to this work. Finally, we
address some key vulnerabilities, explore open questions, and observe
forward--compatibility with the quantum internet and quantum computing
technologies.Comment: 25 pages, 5 figure
Secure and Privacy-Preserving Authentication Protocols for Wireless Mesh Networks
Wireless mesh networks (WMNs) have emerged as a promising concept to meet the
challenges in next-generation wireless networks such as providing flexible,
adaptive, and reconfigurable architecture while offering cost-effective
solutions to service providers. As WMNs become an increasingly popular
replacement technology for last-mile connectivity to the home networking,
community and neighborhood networking, it is imperative to design efficient and
secure communication protocols for these networks. However, several
vulnerabilities exist in currently existing protocols for WMNs. These security
loopholes can be exploited by potential attackers to launch attack on WMNs. The
absence of a central point of administration makes securing WMNs even more
challenging. The broadcast nature of transmission and the dependency on the
intermediate nodes for multi-hop communications lead to several security
vulnerabilities in WMNs. The attacks can be external as well as internal in
nature. External attacks are launched by intruders who are not authorized users
of the network. For example, an intruding node may eavesdrop on the packets and
replay those packets at a later point of time to gain access to the network
resources. On the other hand, the internal attacks are launched by the nodes
that are part of the WMN. On example of such attack is an intermediate node
dropping packets which it was supposed to forward. This chapter presents a
comprehensive discussion on the current authentication and privacy protection
schemes for WMN. In addition, it proposes a novel security protocol for node
authentication and message confidentiality and an anonymization scheme for
privacy protection of users in WMNs.Comment: 32 pages, 10 figures. The work is an extended version of the author's
previous works submitted in CoRR: arXiv:1107.5538v1 and arXiv:1102.1226v
Privacy-Enhanced AKMA for Multi-Access Edge Computing Mobility
Multi-access edge computing (MEC) is an emerging technology of 5G that brings cloud computing benefits closer to the user. The current specifications of MEC describe the connectivity of mobile users and the MEC host, but they have issues with application-level security and privacy. We consider how to provide secure and privacy-preserving communication channels between a mobile user and a MEC application in the non-roaming case. It includes protocols for registration of the user to the main server of the MEC application, renewal of the shared key, and usage of the MEC application in the MEC host when the user is stationary or mobile. For these protocols, we designed a privacy-enhanced version of the 5G authentication and key management for applications (AKMA) service. We formally verified the current specification of AKMA using ProVerif and found a new spoofing attack as well as other security and privacy vulnerabilities. Then we propose a fix against the spoofing attack. The privacy-enhanced AKMA is designed considering these shortcomings. We formally verified the privacy-enhanced AKMA and adapted it to our solution
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