# Bio-Inspired Dynamic Trust and Congestion-Aware Zone-Based Secured Internet of Drone Things (SIoDT)
## 5 Results and Discussion
### Subsection Dynamic Trust Estimation  
In this section, the considered parameters such as energy efficiency, packet delivery ratio, routing overhead, end-to-end delay, packet loss, and throughput are analyzed in detail concerning speed (10-35 m.s\({}^{-1}\)), with the presence of certain attacks such as the flooding attack, insider attack, wormhole attack, and position falsification attack. The simulation values are shown in Tables 4 and 5 below.  
The efficiency in terms of attacks is flooding attack (97% to 93%), insider attack (98% to 92%), wormhole attack (98% to 93%), and position falsification attack (95% to 90%). From this measure, it is understood that an increase in speed reduces the efficiency of the network. The proposed method produced high efficiency with the presence of certain attacks such as flooding attacks, insider attacks, and wormhole attacks. Unfortunately, the efficiency received with the position falsification attack is a little low compared with the other attacks.  
The increase in speed reduces the packet delivery ratio, which in terms of attacks, are flooding attacks (98% to 96%), insider attacks (97% to 94%), wormhole attacks (96% to 91%), and position falsification attacks (93% to 89%). The proposed BDTC-SIOVAs produced a high packet delivery ratio with the presence of certain attacks such as flooding attacks, insider attacks, and wormhole attacks. However, the ratio received with the position falsification attack is a little low compared with the other attacks. The increase in speed increases the overhead, which in terms of attacks, are flooding attack (196 to 964) packets, insider attack (254 to 1025) packets, wormhole attack (316 to 1125) packets, and position falsification attack (345 to 1245) packets. The proposed BDTC-SIOVAs produced a low overhead for all the attacks present in the network.  
The increase in speed increases the delay, which in terms of attacks, are flooding attack (55 to 112) ms, insider attack (62 to 125) ms, wormhole attack (75 to 156) ms, and position falsification attack (83 to 176) ms. The proposed BDTC-SIOVAs produced a low delay for all the attacks present in the network. However, there is a variation in the attack performances. The proposed BDTC-SIOVAs produced much better results for flooding and insider attacks when compared with the wormhole and position falsification attack.  
The increase in speed increases the packet loss, which in terms of attacks, are flooding attacks (102 to 235) packets, insider attacks (144 to 245) packets, wormhole attacks (165 to 275) packets, and position falsification attacks (171 to 282) packets. The proposed BDTC-SIOVAs produced a low loss of packets for all the attacks present in the network. The increase in speed reduces the throughput, which in terms of attacks, are flooding attacks (998 to 756) kbps, insider attacks (925 to 721) kbps, wormhole attacks (857 to 694) kbps, and  
Figure 12: Throughput based on varying speed of vehicles.  
position falsification attacks (825 to 691) kbps. The proposed BDTC-SIOVTs produced a high throughput for all the attacks present in the network, but according to the increase in speed, there is some gradual reduction in throughput.