Design And Simulation Of MANET Anti-eavesdrop Algorithm Based On Network Coding

MANET is a wireless network which has the characteristics of self-organization, no infrastructure, multi-hop and transmitting the message with the wireless and multi-hop links among nodes. Common method of protecting the data against the eavesdroppers is encryption scheme based on cryptography, but the encryption solution based on cryptography is difficult to meet the demands of MANT anti-eavesdrop, the inapplicability displayed in network structure, algorithm complexity and security level. Therefore, how to resist the wiretap attack in MANET has became a key issue.Aiming at the MANET anti-eavesdrop security demand and potential safety hazard, proposing the secure random linear network coding plan. The plan has four relevant parts of optimizing the finite region, information source secure coding, protecting the coding vectors and anti-pollution attacks. Firstly, define the information source secure coding method and optimizing the finite region, guarantee the information is properly protected. Secondly, different coding vector protecting plans are designed for adapting have or not security path. Last, applying anti-pollution algorithm resist the pollution attacks in MANET, guarantee the anti-eavesdrop plan is well implemented. Applying the secure random linear network coding plan in MANET meets the demand on anti-eavesdrop.Focusing on an especial topological structure in MANET, single hop cluster MANET, considering the anti-eavesdrop security demand and especial location of cluster head, raising a single hop cluster MANET anti-eavesdrop plan based on network coding. Cluster member nodes code message with its own secure coding information and send the coded information to cluster head. To cluster head, if coding opportunity is absent, replace the secure coding message to satisfy the information theoretical standard. If there is coding opportunity, the cluster head conduct the secure coding transmission, to meet the weak security standard. Applying above plan in single hop cluster MANET meets the demand on anti-eavesdrop.The MANET anti-eavesdrop plan based on network coding is simulated and analyzed in NS2 platform, the results showed that comparing with the encryption plan, the anti-eavesdrop plan based on network coding has better performance in end-to-end delay, encryption speed, energy and throughput ratio.