Using Network Processor to Establish Trustworthy Agent Scheme for AODV Routing Protocol

Network Processor (NP) is optimized to perform network tasks. It uses massive parallel processing architecture to achieve high performance. Ad hoc network is an exciting research aspect due to the characters of self-organization, dynamically topology and temporary network life. However, all the characters make the security problem more serious. Denial-of-Service (DoS) attack is the main puzzle in the security of Ad hoc network. A novel NP-based trustworthy agent scheme is proposed to combat the attack. Trustworthy agent is established by a hardware thread in NP. Agent can update itself at some interval by the trustworthiness of the neighbor nodes. Agent can trace the RREQ and RREP messages stream to aggregate the key information and analyze them by intrusion detection algorithm. NS2 simulator is expanded to validate the security and trustworthy scheme. Simulation results show that NP-based trustworthy agent scheme is effective to detect DoS attacks.