Abstract: Ad HOC network is vulnerable to attacks due to the characters of self-organization dynamically changing topology and temporary network life. Black hole attack is the main puzzle in the security of Ad HOC network. There are not satisfied solutions to solve the problem. A novel security agent scheme is proposed to combat the attack in AODV routing protocol. Network Processor (NP) uses parallel multithreading architecture to achieve high performance. Security agent is established by a hardware thread in NP. Agent has dynamic lifetime as the thread state transition. Agent can migrate to higher trustworthiness neighbor nodes. It appears in right time and space in our security scheme. The number of Agent is equal to the number of AODV routing stream. Agent can trace the key information of AODV routing stream and analyze them by intrusion detection algorithm. Simulation results show that performance metric decreases from about 2.2 KByte/s to nearly 0 KByte/s under Black hole attack, however it recovers to about 2.2 KByte/s in our security scheme.
Chen Hongsong , Ji Zhenzhou and Hu Mingzeng , 2006. A Novel Security Agent Scheme for Aodv Routing Protocol Based on Thread State Transition. Asian Journal of Information Technology, 5: 54-60.