Security measures Computer networks 77 Computer security 50 Access control 20 Data protection 20 Data encryption (Computer science) 15 Computers 12 Cryptography 12 Mobile computing 11 Electronic commerce 9 Wireless communication systems 8 Information technology 7 Intrusion detection systems (Computer security) 7 Mobile communication systems 7 Cell phones 6 Cloud computing 6 Computer network protocols 6 Dissertations 6 Internet 6 Medical records 6 Passwords 6 Public key infrastructure (Computer security) 6 Quantum communication 6 Data processing 5 Dissertations, Academic 5 Information storage and retrieval systems 5 Internet of things 5 Prevention 5 Quantum theory 5 Safety measures 5