Unfairness of a protocol for certified delivery

Recently, Nenadić \emph{et al.} (2004) proposed the RSA-CEGD protocol for certified delivery of e-goods. This is a relatively complex scheme based on verifiable and recoverable encrypted signatures (VRES) to guarantee properties such as strong fairness and non-repudiation, among others. In this paper, we demonstrate how this protocol cannot achieve fairness by presenting a severe attack and also pointing out some other weaknesses

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

The Impact Of Clean Development Mechanism Projects On Sustainable Development In South Africa

Clean Development Mechanisms (CDM) have achieved a certain level of cost-effective emission reductions in developing countries. In this context the uneven distribution of CDM projects in certain regions as well as the concentration of CDM projects amongst certain sectors in developing countries have resulted in the issue of whether CDM projects contribute to sustainable development in developing countries. This article examines the impact of CDM projects on sustainable development in South Africa by examining a sample of working CDM projects there and evaluating their impact on environmental, economic and social sustainable development. Based on observations during the study, CDM policy changes are reviewed, and options to enhance the sustainable development implications of CDM projects are explained

National Class Actions in Canada: Yet Another Call for Clarity and Coordination

Just as economic markets increasingly neglect Canada’s domestic borders, so too does the consequent infliction of harm. Not surprisingly, then, the national class action has emerged as a desirable vehicle for mass redress. Desirable, perhaps, but are national class actions constitutional? Distinguished Canadian scholars continue to construct persuasive arguments on both sides, meanwhile, courts continue to assume jurisdiction over national classes. Accordingly, this paper argues that while the permissibility of multijurisdictional class proceedings might make for an engaging debate, the apparent willingness of courts to certify national classes means that the path forward is not through academic discourse, but through the creation of realistic mechanisms of interprovincial judicial coordination

National Class Actions in Canada: Yet Another Call for Clarity and Coordination

Just as economic markets increasingly neglect Canada’s domestic borders, so too does the consequent infliction of harm. Not surprisingly, then, the national class action has emerged as a desirable vehicle for mass redress. Desirable, perhaps, but are national class actions constitutional? Distinguished Canadian scholars continue to construct persuasive arguments on both sides, meanwhile, courts continue to assume jurisdiction over national classes. Accordingly, this paper argues that while the permissibility of multijurisdictional class proceedings might make for an engaging debate, the apparent willingness of courts to certify national classes means that the path forward is not through academic discourse, but through the creation of realistic mechanisms of interprovincial judicial coordination

State v. Houser Appellant\u27s Reply Brief Dckt. 41540

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