## 6 Results and Evaluation
### Blockchain Network Latency Analysis  
In this section, we analyse the network latency using our test bed. We used seven blockchain nodes, fifteen blockchain nodes, and twenty blockchain nodes to measure the latency of different blockchain networks. Figure 3 shows blockchain networks' latency variability in terms of blockchain network run time. The results in Figure 3 show that the latency of the seven Hydrachain blockchain network is less than 300 ms. The network with fifteen blockchain nodes has indicated a latency between 300 ms and 400 ms. Also, the graph shows over 400 ms of network latency with twenty blockchain nodes [39]. This indicates the increment of blockchain nodes causes the increment of the Hydrachain blockchain's network latency. As per the results in Figure 3, the Monero blockchain algorithm has indicated higher latency than the Hydrachain blockchain algorithm. As Figure 3 shows, the network with seven blockchain nodes has a latency between 400 and 600 ms. Also, the network with fifteen blockchain nodes has a latency between 600 and 800 ms. The network with twenty blockchain nodes has over 800 ms of network latency. This shows us that the Monero blockchain algorithm also increases the latency by increasing the number of nodes [39]. Also, as the results in Figure 3 show, the latency of the Duino coin blockchain network is lower than the Monero blockchain algorithm. As the figure indicates, the network with seven blockchain nodes has a latency of 200 ms to 300 ms. Also, the network with fifteen blockchain nodes shows a latency close to 400 ms. The network with twenty blockchain nodes has over 400 ms of latency. Figure 4 shows the latency standard deviations of blockchain networks. The box plot graph in Figure 4 indicates the standard deviations of the blockchain networks' latency results with the box bounding the 25% and 75% percentiles. As per the results, the upper bound of the network with seven Hydrochain blockchain nodes is 215 ms, and the lower bound is 213 ms. The upper bound of the network with fifteen Hydrochain nodes is 389 ms, and the lower bound is 387 ms. Also, the network with twenty blockchain nodes has an upper bound of 420 ms and a lower bound of 418 ms. The upper bound of the network with seven Monero blockchain nodes is 488 ms, and the lower bound is 485 ms. The upper bound of the network with fifteen Monero blockchain nodes is 730 ms, and the lower bound is 727 ms. Also, the upper bound of the Monero network with twenty blockchain nodes is 821 ms, and the lower bound is 815 ms. The network with seven Duino coin blockchain nodes has an upper standard deviation bound of 241 ms and a lower bound of 237 ms. Also, the upper bound of the network with fifteen Duino coin blockchain nodes is 398 ms, and the lower bound is 391 ms. Also, the upper bound of the network with twenty Duino coin blockchain nodes is 455 ms, and the lower bound is 449 ms. Figure 5 shows the mean network latency in terms of the number of blockchain nodes [39]. Figure 4: Latency standard deviations of blockchain networks. Figure 3: Latency variability of blockchain networks. As the results indicate, the mean latency of the seven-node Hydrachain blockchain network is 214.8 ms. The mean latency of the fifteen-node blockchain network is 388.4 ms, and the graph shows 419.6 ms latency for the network with twenty blockchain nodes [40]. As Figure 5 indicates, the network with seven Monero blockchain nodes has 486.6 ms of mean latency. Also, the blockchain network with fifteen blockchain nodes has 728.6 ms of mean latency, and the network with twenty blockchain nodes shows 817.6 ms mean latency [40]  
The results in Figure 5 indicate that the mean network latency of the seven-node Duino coin blockchain network is 239.2 ms and the network with fifteen blockchain nodes has 391.2 ms of latency. Also, the network with twenty blockchain nodes shows 452 ms of latency. These results show that the latency has increased with the increment of the Duino coin blockchain nodes [40].