Adaptive convolutional-LSTM neural network with NADAM optimization for intrusion detection in underwater IoT wireless sensor networks

Abstract Underwater IoT networks rely on sensor nodes to continuously monitor and collect real-time data from marine environments. The nodes in the underwater networks face security challenges in terms of intrusions. Intrusions are common in conventional wireless sensor networks as well as in underwater sensor networks. Intrusions like data tampering, node insertion, unauthorized access compromises the security and privacy of the network. The existing Intrusion Detection Systems (IDS) faces limitations while detecting intrusions in Underwater IoT Wireless Sensor Networks (UIoTWSN) due to the dynamic condition of underwater environment. To overcome this, a novel IDS for UIoTWSN is proposed by combining the features of advanced deep learning techniques in an optimized manner. The proposed hybrid model comprises convolutional LSTM network with NADAM optimizer to analyze the spatial and temporal features to detect the intrusions. To handle the dynamic nature of underwater sensor network and to improve the convergence speed of the proposed IDS, NADAM optimizer is integrated in this research work. Experimentations of the proposed model validates the higher accuracy of 96.7%, precision of 94.5% and recall of 95.2% which is better than the conventional techniques.