Intrusion detection 15 Network security 10 Intrusion detection systems (Computer security). Computer network security. Hackers 9 Computer crime 5 Cybersecurity 5 Intrusion Detection Systems 5 machine learning 5 Cyber security 4 Feature extraction 4 Intrusion-Detection 4 Classification (of information) 3 Computer networks. General works. Traffic monitoring 3 Intrusion detection system 3 Network intrusion detection 3 smart city 3 Authentication 2 Communication wireless network 2 Communications networks 2 Convolutional neural networks 2 Cybe security for smart city 2 Deep learning 2 Feature Selection 2 Genetic algorithm 2 In-depth understanding 2 Information and Communication Technologies 2 Internet of Things (IoT) 2 Internet of vehicle 2 Learning systems 2 Man in the middle 2 Man-in-the-middle attack 2