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The rapid consumer adoption of high-speed Internet connections has lead to the unprecedented interconnection of home networks. Consequently, the number of domestic home automation networks offering Internet connectivity has increased. These home automation networks are increasingly comprised of resource limited wireless sensor networks (WSN). This creates the potential for malicious users from across the Internet to attack these resource-limited WSN. One such threat is that of a denial of service (DoS) attack. Due to the resource-limited nature of WSN, a DoS attack may disrupt communications on the WSN or block remote access to the WSN. The existing DoS defence approaches are generic approaches aimed at processing and filtering all Internet traffic to remove suspected DoS attack traffic. However, these approaches are not capable of filtering out all attack traffic, instead a small amount of attack traffic reaches the attackers intended victim. This small level of attack traffic poses a significant threat to the limited resources of WSN. This paper reviews the design and implementation of a novel defence strategy designed to work alongside existing DoS counter measures to overcome the aforementioned shortcomings.
Date of Conference: 3-5 Nov. 2009