Computer networks Security measures Computer security 39 Access control 12 Data protection 10 Computers 9 Intrusion detection systems (Computer security) 6 Passwords 6 Computer network protocols 5 Data encryption (Computer science) 5 Internet 4 Cryptography 3 Dissertations 3 Dissertations, Academic 3 Electronic commerce 3 Firewalls (Computer security) 3 Information technology 3 Mobile computing 3 Prevention 3 Anomaly detection (Computer security) 2 Asynchronous transfer mode 2 Business enterprises 2 Cloud computing 2 Computer crimes 2 Computer viruses 2 Database security 2 Electronic mail messages 2 Instant messaging 2 Internet of things 2 Machine learning 2