Stasis Trap: Cross- Layer attack & its Defense in Cognitive Radio Networks.

详细信息   

• 作者：Nagireddygari ; Dileep.
• 学历：M.S.
• 年：2014
• 毕业院校：Oklahoma State University
• Department：Computer Science
• ISBN：9781321071962
• CBH：1561642
• Country：USA
• 语种：English
• FileSize：3819204
• Pages：67

文摘

Spectrum shortage is a major problem in wireless communications. Existing research on attacks and security issues in CR networks focus on individual network layers. In this thesis,we identify a cross-layer attack,called the Stasis Trap attack. This attack is launched from the MAC layer as the point of attack but the final target goal is to degrade TCP layer end to end throughput of flows by exploiting the TCP congestion control mechanism in cognitive radio. The chances of the attacker being detected are low owing to the fact that the target layer is different from the layer where the attack is launched. An adversary launches an attack on the MAC layer causing large variations in Round Trip Time RTT) resulting in a large drop in throughput of TCP flows drop of around 40% from our simulation results) but has little effect on the MAC-layer throughput and hence is very difficult to detect. A defense for this Stasis Trap attack is proposed using a deterministic key pre-distribution algorithm where the keys are pre-distributed to nodes and If any two nodes want to communicate with each other,they either search for a common key and a common channel between them or look for intermediate nodes which have the same in common and communicate through them. Simulation results show that the throughput was restored to its original levels using key pre-distribution.