An Improved Security OLSR Protocol against Black Hole Attack based on FANET

Flying ad hoc network (FANET) is an unmanned aerial vehicle multi-hop, autonomous Mobile ad hoc network (MANET). FANET has many applications in military and civilian fields, such as emergency operations, rescue early warning, and target detection. However, the FANET network still faces severe security risks. Any node in the network can act as a message forwarding node. Therefore, malicious nodes may inject fake routing tables into the network or send wrong routing messages, seriously affecting network data transmission. The black hole attack is a typical attack on FANET. After a malicious black hole node joins the network, it will selectively or entirely discard the data packets it receives. Optimized link state routing (OLSR) is a routing protocol widely applied in FANET with low overhead. However, it still faces security threats, especially the black hole attack, which endangers communication quality seriously. This paper proposes an improved OLSR protocol called secure-OLSR (S-OLSR) to detect black hole attacks. S-OLSR uses fuzzy logic to evaluate node trust value, optimizes the multipoint relay node selection algorithm in OLSR, and improves the security of the OLSR protocol. We simulate the method on the NS-2.35 platform, evaluating the security of S-OLSR using performance parameters such as packet delivery ratio, throughput, and End-to-End Delay. The simulation results show that the S-OLSR model can resist black hole attacks better than the OLSR model.