Security measures Computer security 56 Computer networks 49 Access control 15 Data protection 10 Mobile computing 10 Computers 9 Dissertations 8 Dissertations, Academic 8 Intrusion detection systems (Computer security) 7 Mobile communication systems 7 Cloud computing 6 Data encryption (Computer science) 6 Public key infrastructure (Computer security) 6 Information technology 5 Internet 5 Firewalls (Computer security) 4 Passwords 4 Cell phones 3 Computer crimes 3 Computer network protocols 3 Instant messaging 3 Machine learning 3 Malware (Computer software) 3 Prevention 3 Anomaly detection (Computer security) 2 Auditing 2 Cell phone systems 2 Civil service 2 Computer hackers 2