Intrusion detection systems (Computer security). Computer network security. Hackers 9 Network security 7 Intrusion detection 6 Computer crime 5 Cybersecurity 5 Intrusion Detection Systems 5 Technology: general issues 5 Cyber security 4 History of engineering & technology 4 Computer networks. General works. Traffic monitoring 3 Intrusion detection system 3 machine learning 3 smart city 3 Authentication 2 Communication wireless network 2 Communications networks 2 Computer security 2 Cybe security for smart city 2 Deep learning 2 Information and Communication Technologies 2 Internet of Things (IoT) 2 Man in the middle 2 Man-in-the-middle attack 2 Network intrusion detection system 2 Network intrusion detection systems 2 Smart city 2 Smart meters 2 Smart phones 2 Smartphones 2 Wireless networks 2