Network security Cybersecurity 15 Internet of things 14 Cyber security 11 Authentication 10 Computer crime 8 Intrusion detection 8 Block-chain 7 Crime 7 Denial-of-service attack 7 Networks security 7 Security 7 Blockchain 6 Internet protocols 6 Machine learning 6 Network architecture 6 Security systems 6 Smart city 6 Cloud computing 5 Convolutional neural networks 5 Cryptography 5 Deep learning 5 Digital storage 5 Energy efficiency 5 Information management 5 Intrusion Detection Systems 5 Public key cryptography 5 article 5 network security 5 'current 4