الفهرس Only 14 pages are availabe for public view
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Abstract
The Routing Protocol for Low Power and Lossy networks (RPL) is a novel routing protocol designed for constrained networks such as wireless sensor networks. from the security point of view, RPL provides optional cryptography mechanisms to secure networks from external attacks. However, an adversary can benefits from the nature of sensor networks and compromises legitimate nodes due to the fact that these networks are not tamper resistant and are limited in terms of security. The compromised nodes can be used to run internal attacks, such as, black-hole and gray-hole attacks. In this thesis, we analyze the impact of packet dropping attacks on the performance of RPL in a wireless sensor network. The work is two-fold: First, we propose a light forwarding assessment scheme based on two-hop acknowledgment that can be utilized in RPL to mitigate stand-alone packet dropping attacks. Second, we propose a traffic monitoring with block acknowledgement schemeto mitigate a more complex attacker model in which a group of colluding malicious nodes cooperate to DROP a significant number of packets. Finally, we evaluate our schemes on J-Sim using different performance metrics such as Packet Delivery Ratio (PDR) and communication overhead